general_fact: 5751 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 5751 is the number of ordered sequences of coins totaling 31 cents.
trivia: 5751 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: September 29th is the day in 522 BC that Darius I of Persia kills the Magian usurper Gaumâta, securing his hold as king of the Persian Empire.