For the year A.D. 57, see 57.

Fifty-seven (57, LVII) is the natural number following fifty-six and preceeding fifty-eight. Its divisors are 1, 3, 19, and 57; its factorisation is

Fifty-seven is also:

  • The atomic number of lanthanum, the first lanthanide.
  • The code for international direct dial phone calls to Colombia.
  • The number of varieties used by Heinz as a marketing slogan and commonly found on their ketchup bottles [1].
  • The designation of Interstate 57, a freeway that runs from Missouri to Illinois.
  • In the title of the movie Passenger 57, starring Wesley Snipes.

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