54 (number) - Definition and Overview

Fifty-four (54) is the natural number following 53 and preceding 55.

In mathematics

54 is a 19-gonal number and a Harshad number.

In science

• The atomic number of xenon

In astronomy,

Messier object M54, a magnitude 8.5 globular cluster in the constellation Sagittarius

The New General Catalogue object (http://www.ngcic.org/) NGC 54, a spiral galaxy in the constellation Cetus

The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -1284 July 25 and ended on 32 September 3. The duration of Saros series 54 was 1316.2 years, and it contained 74 solar eclipses.

The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -964 May 14 and ended on 334 July 3. The duration of Saros series 54 was 1298.1 years, and it contained 73 lunar eclipses.

In other fields

Fifty-four is also:

• The code for international direct dial phone calls to Argentina.
• The title of a 1998 movie about Studio 54 starring Salma Hayek and Ryan Phillippe.
• The number of colored squares on a Rubik's cube.
• In the title of a 1960s television show titled Car 54, Where Are You?.
• The code for the French Département of Meurthe-et-Moselle.

As a year, it can refer to AD 54, 54 BC, or 1954.