Fatto generale: 89531 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 89531 is an uninteresting number.
Trivia: 89531 is a boring number.
Data storica: February 15th is the day in 1979 that Don Dunstan resigns as Premier of South Australia, ending a decade of sweeping social liberalisation.