Fait général: 15023 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 15023 is a boring number.
Culture générale: 15023 is an uninteresting number.
Date historique: February 16th is the day in 1957 that the "Toddlers' Truce", a controversial television close down between 6.00 pm and 7.00 pm is abolished in the United Kingdom.