general_fact: 89531 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 89531 is an uninteresting number.
trivia: 89531 is an uninteresting number.
historical_date: February 15th is the day in 1946 that ENIAC, the first electronic general-purpose computer, is formally dedicated at the University of Pennsylvania in Philadelphia.