Fait général: 8555 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 8555 is the sum of the first 29 squares.
Culture générale: 8555 is an unremarkable number.
Date historique: June 3rd is the day in 1962 that an Air France Boeing 707 charter, Chateau de Sully crashes after an aborted takeoff from Paris-Orly Airport, killing 130.