155 (number): Difference between revisions

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Cardinal	one hundred fifty-five
Ordinal	155th; (one hundred fifty-fifth)
Factorization	5 × 31
Divisors	1, 5, 31, 155
Greek numeral	ΡろーΝにゅーΕいぷしろん´
Roman numeral	CLV
Binary	100110112
Ternary	122023
Senary	4156
Octal	2338
Duodecimal	10B12
Hexadecimal	9B16

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Latest revision as of 11:30, 13 April 2024

155 (one hundred [and] fifty-five) is the natural number following 154 and preceding 156.

In mathematics

155 is:

a composite number
a semiprime.
a deficient number, since 1+5+31=37<155.
odious, since its binary expansion $10011011_{2}$ has a total of 5 ones in it.

There are 155 primitive permutation groups of degree 81. OEIS: A000019

If one adds up all the primes from the least through the greatest prime factors of 155, that is, 5 and 31, the result is 155. (sequence A055233 in the OEIS) Only three other "small" semiprimes (10, 39, and 371) share this attribute.

In the military

USS Capable (AM-155) was a United States Navy Admirable-class minesweeper during World War II
USS Cole (DD-155) was a United States Navy Wickes-class destroyer during World War II
USS General A. W. Brewster (AP-155) was a United States Navy General G. O. Squier-class transport during World War II
USS Hopping (DE-155) was a United States Navy Buckley-class destroyer escort during World War II
USS Lycoming (APA-155) was a United States Navy Haskell-class attack transport during World War II
USS Mustang (IX-155) was a United States Navy four-master wooden schooner during World War II
155mm artillery, a common caliber

In sports

The maximum possible score in a single break in snooker, with a free ball at the start of the break (147 is the highest possible without a free ball)

In transportation

Alfa Romeo 155, a compact executive car produced from 1992 to 1998
Seattle Bus Route 155
London Bus Route 155
The British Rail Class 155 is a diesel multiple unit British train
Blériot 155 was a French airliner of the 1920s
155th Street, Manhattan, New York
155th Street New York City Subway stations:

In other fields

155 is also:

The year AD 155 or 155 BC
155 is the number for the International Operator in the United Kingdom
155 is the number for the emergency medical services in the Czech Republic and Slovakia
155 AH is a year in the Islamic calendar that corresponds to 771–772 CE
155 Scylla is a main belt asteroid
Europium-155 is a radioisotope or Europium and fission product with a half-life of 4.76 years
155, a 2007 song by the band +44
The dialing code for Obihiro, Japan
The atomic number of an element temporarily called unquintquinttium
155 North Wacker is a 46-story skyscraper in Chicago
Wolseley No. 155, Saskatchewan, is a rural municipality in Canada

References

External links

@@ Line 1: / Line 1: @@
-{{example farm|date=February 2013}}
 {{Infobox number
 | number = 155
@@ Line 10: / Line 9: @@
 *a [[composite number]]
 *a [[semiprime]].
-*a [[deficient number]], since <math>1+5+31=36<155.</math>
+*a [[deficient number]], since [[1 (number)|1]]+[[5]]+[[31 (number)|31]]=[[37 (number)|37]]<155.
 *[[Odious number|odious]], since its [[binary expansion]] <math>10011011_2</math> has a total of 5 ones in it.
@@ Line 18: / Line 17: @@
 ==In the military==
-* [[USS Capable (AM-155)]] was a [[United States Navy]] Admirable minesweeper ship during [[World War II]]
+* {{USS|Capable|AM-155}} was a [[United States Navy]] ''Admirable''-class minesweeper during [[World War II]]
-* [[USS Cole (DD-155)]] was a [[United States Navy]] Wickes-class [[destroyer]] during [[World War II]]
+* {{USS|Cole|DD-155}} was a United States Navy ''Wickes''-class destroyer during World War II
-* [[USS General A. W. Brewster (AP-155)]] was a [[United States Navy]] General G. O. Squier transport ship during [[World War II]]
+* {{USS|General A. W. Brewster|AP-155}} was a United States Navy ''General G. O. Squier''-class transport during World War II
-* [[USS Hopping (DE-155)]] was a [[United States Navy]] Buckley destroyer escort ship during [[World War II]]
+* {{USS|Hopping|DE-155}} was a United States Navy ''Buckley''-class destroyer escort during World War II
-* [[USS Lycoming (APA-155)]] was a [[United States Navy]] [[Haskell class attack transport|Haskell-class]] [[attack transport]] during [[World War II]]
+* {{USS|Lycoming|APA-155}} was a United States Navy {{sclass|Haskell|attack transport}} during World War II
-* [[USS Mustang (IX-155)]] was a [[United States Navy]] four-master wooden [[schooner]] during [[World War II]]
+* {{USS|Mustang|IX-155}} was a United States Navy four-master wooden [[schooner]] during World War II
+* [[155 mm|155mm artillery]], a common caliber
 ==In sports==
-* The [[maximum break#Breaks_exceeding_147|maximum possible score]] in a single break in [[snooker]], with a free ball at the start of the break ([[147 (number)|147]] is the highest possible without a free ball)
+* The [[maximum break#Breaks exceeding 147|maximum possible score]] in a single break in [[snooker]], with a free ball at the start of the break ([[147 (number)|147]] is the highest possible without a free ball)
 ==In transportation==
-* [[Alfa Romeo 155]], a [[compact executive car]] produced from 1992–1998
+* [[Alfa Romeo 155]], a [[compact executive car]] produced from 1992 to 1998
 * [https://web.archive.org/web/20021002191528/http://transit.metrokc.gov/tops/bus/schedules/s155_0_.html Seattle Bus Route 155]
 * [http://www.londonbusroutes.net/times/155.htm London Bus Route 155]
 * The [[British Rail Class 155]] is a [[diesel multiple unit]] [[United Kingdom|British]] [[train]]
-* [[Blériot 155]] was a [[France|French]] [[airliner]] of the 1920s
+* [[Blériot 155]] was a French [[airliner]] of the 1920s
 * [[155th Street (Manhattan)|155th Street, Manhattan, New York]]
 * 155th Street New York City Subway stations:
@@ Line 45: / Line 45: @@
 * The year [[155|AD 155]] or [[155 BC]]
 * 155 is the number for the International Operator in the United Kingdom
-* 155 AH is a year in the [[Islamic calendar]] that corresponds to 771 &ndash; 772 [[Common Era|CE]]
+* 155 is the number for the [[emergency medical services]] in the [[Czech Republic]] and [[Slovakia]]
+* 155 AH is a year in the [[Islamic calendar]] that corresponds to 771&ndash;772 [[Common Era|CE]]
 * [[155 Scylla]] is a [[Asteroid belt|main belt]] [[asteroid]]
 * [[Europium-155]] is a [[radioisotope]] or [[Europium]] and [[fission product]] with a [[half-life]] of 4.76 years
@@ Line 51: / Line 52: @@
 * The dialing code for [[Obihiro, Japan]]
 * The [[atomic number]] of an element temporarily called [http://www.flw.com/datatools/periodic/001.php?id=155 unquintquinttium]
-* [[155 North Wacker]] is a 46-story [[skyscraper]] under [[construction]] in [[Chicago]]
+* [[155 North Wacker]] is a 46-story [[skyscraper]] in [[Chicago]]
-* [[Wolseley No. 155, Saskatchewan]] is a rural municipality in [[Canada]]
+* [[Wolseley No. 155, Saskatchewan]], is a rural municipality in [[Canada]]
 ==See also==
@@ Line 65: / Line 66: @@
 ==External links==
-{{Commons category|155 (number)}}
+{{Commons category}}
+{{Integers|1}}
 {{DEFAULTSORT:155 (Number)}}
-{{Integers|1}}
 [[Category:Integers]]
-{{Num-stub}}