Fait général: 15509 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 15509 is an unremarkable number.
Culture générale: 15509 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: June 17th is the day in 1462 that Vlad III the Impaler attempts to assassinate Mehmed II (The Night Attack) forcing him to retreat from Wallachia.