Fatto generale: 15236 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15236 is a boring number.
Trivia: 15236 is a boring number.
Data storica: September 17th is the day in 2001 that the New York Stock Exchange reopens for trading after the September 11 Attacks, the longest closure since the Great Depression.