Fatto generale: 2615 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2615 is the number of functions from 9 unlabeled points to themselves.
Trivia: 2615 is a boring number.
Data storica: February 27th is the day in 1951 that the Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms, is ratified.