General fact: 9224 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 9224 is an octahedral number.
Trivia: 9224 is a boring number.
Historical date: April 2nd is the day in 1902 that Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, St Petersburg.