Fatto generale: 15614 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15614 is an unremarkable number.
Trivia: 15614 is an uninteresting number.
Data storica: September 30th is the day in 1791 that the first performance of The Magic Flute, the last opera by Mozart to make its debut, took place at Freihaus-Theater auf der Wieden in Vienna, Austria.