Fait mathématique: 52170 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 52170 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 1st is the day in 1814 that Congress of Vienna opens to re-draw the European political map after the defeat of France, in the Napoleonic Wars.