Fait général: 16831 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 16831 is an uninteresting number.
Culture générale: 16831 is a boring number.
Date historique: January 29th is the day in 904 that Sergius III comes out of retirement to take over the papacy from the deposed antipope Christopher.