Fatto generale: 6513 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 6513 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 6513 is an uninteresting number.
Data storica: October 30th is the day in 1945 that Jackie Robinson of the Kansas City Monarchs signs a contract for the Brooklyn Dodgers to break the baseball color barrier.