Fatto generale: 15544 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15544 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 15544 is an unremarkable number.
Data storica: July 22nd is the day in 1793 that Alexander Mackenzie reaches the Pacific Ocean becoming the first Euro-American to complete a transcontinental crossing of Canada.