general_fact: 15424 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 15424 is an uninteresting number.
trivia: 15424 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: March 24th is the day in 1603 that Tokugawa Ieyasu is granted the title of shogun from Emperor Go-Yozei, and establishes the Tokugawa Shogunate in Edo, Japan.