Fait général: 21715 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21715 is an unremarkable number.
Culture générale: 21715 is an uninteresting number.
Date historique: June 14th is the day in 1846 that Bear Flag Revolt begins – Anglo settlers in Sonoma, California, start a rebellion against Mexico and proclaim the California Republic.