Fait général: 47220 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 47220 is an unremarkable number.
Culture générale: 47220 is an uninteresting number.
Date historique: April 13th is the day in 1970 that an oxygen tank aboard Apollo 13 explodes, putting the crew in great danger and causing major damage to the spacecraft while en route to the Moon.