Fatto generale: 6311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 6311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 6311 is an unremarkable number.
Data storica: April 11th is the day in 1981 that a massive riot in Brixton, South London, results in almost 300 police injuries and 65 serious civilian injuries.