54 (number)

Fifty-four (54) is the natural number following 53 and preceding 55. It is a 19-gonal number and a Harshad number.

Fifty-four is also:

• The atomic number of xenon.
• 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?.

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