Fatto generale: 15807 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15807 is an uninteresting number.
Trivia: 15807 is a boring number.
Data storica: April 11th is the day in 1921 that Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.