Fatto generale: 2915 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2915 is a Lucas-Carmichael number.
Trivia: 2915 is an unremarkable number.
Data storica: December 24th is the day in 1818 that the first performance of "Silent Night" takes place in the church of St. Nikolaus in Oberndorf, Austria.