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'{{Infobox number | number = 155 | divisor = 1, 5, 31, 155 }} '''155''' ('''one hundred [and] fifty-five''') is the [[natural number]] following [[154 (number)|154]] and preceding [[156 (number)|156]]. == In mathematics == '''155''' is: *a [[composite number]] *a [[semiprime]]. *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. There are 155 primitive [[permutation group]]s of degree 81. {{OEIS2C|id=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. {{OEIS|id=A055233}} 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 {{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 * [[155 mm|155mm artillery]], a common caliber ==In sports== * The [[maximum break#Breaks exceeding 147|maximum possible score]] in a singlebjchxmxjdndhdmbdmjdf c jvnfKfjf📟📠 for 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 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 French [[airliner]] of the 1920s * [[155th Street (Manhattan)|155th Street, Manhattan, New York]] * 155th Street New York City Subway stations: ** [[155th Street (IND Concourse Line)]] ** [[155th Street (IND Eighth Avenue Line)]] ** [[155th Street (IRT Ninth Avenue Line)]] (former) ==In other fields== '''155''' is also: * 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 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 * [[155 (song)|155]], a 2007 song by the band [[+44 (band)|+44]] * 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]] in [[Chicago]] * [[Wolseley No. 155, Saskatchewan]] is a rural municipality in [[Canada]] ==See also== * [[List of highways numbered 155]] * [[United Nations Security Council Resolution 155]] * [[List of United States Supreme Court cases, volume 155|United States Supreme Court cases, Volume 155]] * [[Psalms 152–155]] * [[McHenry County, Illinois]] [[Community High School District 155]] == References == {{Reflist}} ==External links== {{Commons category}} {{Integers|1}} {{DEFAULTSORT:155 (Number)}} [[Category:Integers]]'