general_fact: 64223 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 64223 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 64223 is an unremarkable number.
historical_date: November 1st is the day in 1512 that the ceiling of the Sistine Chapel, painted by Michelangelo, is exhibited to the public for the first time.