general_fact: 2331 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 2331 is a centered cube number.
trivia: 2331 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: May 19th is the day in 1962 that a birthday salute to U.S. President John F. Kennedy takes place at Madison Square Garden, New York City.