General fact: 2333 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 2333 is a right-truncatable prime.
Trivia: 2333 is an unremarkable number.
Historical date: May 21st is the day in 1996 that the Trappist Martyrs of Atlas, kidnapped during the Algerian Civil War and held for two months, are found dead.