General fact: 56321 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 56321 is an uninteresting number.
Trivia: 56321 is an unremarkable number.
Historical date: March 14th is the day in 1964 that a jury in Dallas, Texas, finds Jack Ruby guilty of killing Lee Harvey Oswald, assumed assassin of John F. Kennedy.