Fatto generale: 15538 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15538 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 15538 is a boring number.
Data storica: July 16th is the day in 1790 that the District of Columbia is established as the capital of the United States after signature of the Residence Act.