math_fact: 24181 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 24181 is an unremarkable number.
historical_date: March 15th is the day in 1514 that Jodocus Badius Ascensius publishes Christiern Pedersen's Latin version of Saxo’s Gesta Danorum, the oldest known version of that work.