51 may refer to:51 (number), the natural number following 50 and preceding 52 The year 51 BC AD 51 1951 2051 51 (film), a 2011 American horror film directed by Jason Connery "Fifty-One", an episode of the American television drama series Breaking Bad 51 (album), a 2012 mixtape by rapper Kool A.D. "Fifty One", a song by Karma to Burn from the album V, 2011 51 Nemausa, a main-belt asteroid The international calling code for Peru