Fatto generale: 85539 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 85539 is a boring number.
Trivia: 85539 is an uninteresting number.
Data storica: March 13th is the day in 1957 that Cuban student revolutionaries storm the presidential palace in Havana in a failed attempt on the life of President Fulgencio Batista.