Fait général: 15229 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 15229 is an uninteresting number.
Culture générale: 15229 is a boring number.
Date historique: September 10th is the day in 2008 that the Large Hadron Collider at CERN, described as the biggest scientific experiment in history is powered up in Geneva, Switzerland.