General fact: 2431 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 2431 is the Stirling number of the second kind S(13,11).
Trivia: 2431 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: August 27th is the day in 1975 that the Governor of Portuguese Timor abandons its capital, Dili, and flees to Atauro Island, leaving control to a rebel group.