155 (number)

In mathematics

• a composite number
• a semiprime.
• a deficient number, since
• odious, since its binary expansion has a total of 5 ones in it.

In the military

• was a United States Navy Admirable-class minesweeper during World War II
• was a United States Navy Wickes-class destroyer during World War II
• was a United States Navy General G. O. Squier-class transport during World War II
• was a United States Navy Buckley-class destroyer escort during World War II
• was a United States Navy during World War II
• was a United States Navy four-master wooden schooner during World War II

  In sports

• The maximum possible score in a single break in snooker, with a free ball at the start of the break

  In transportation

• Alfa Romeo 155, a compact executive car produced from 1992–1998
• 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:
• * 155th Street
• * 155th Street
• * 155th Street

  In other fields

• The year 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 - 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
• 155 North Wacker is a 46-story skyscraper under construction in Chicago
• Wolseley No. 155, Saskatchewan is a rural municipality in Canada