math_fact: 2522 is the number of subsets of {1,2,3,...,15} that have a sum divisible by 13.
trivia: 2522 is an uninteresting number.
historical_date: November 26th is the day in 783 that the Asturian queen Adosinda is put up in a monastery to prevent her kin from retaking the throne from Mauregatus.