Fatto generale: 2331 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2331 is a centered cube number.
Trivia: 2331 is an unremarkable number.
Data storica: May 19th is the day in 2010 that the Royal Thai Armed Forces concludes its crackdown on protests by forcing the surrender of United Front for Democracy Against Dictatorship leaders.