Fatto generale: 13223 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 13223 is an uninteresting number.
Trivia: 13223 is a boring number.
Data storica: 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.