Fait général: 2722 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2722 is a boring number.
Culture générale: 2722 is an unremarkable number.
Date historique: June 14th is the day in 1940 that a group of 728 Polish political prisoners from Tarnów become the first residents of the Auschwitz concentration camp.