Fait général: 61830 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 61830 is a boring number.
Culture générale: 61830 is an uninteresting number.
Date historique: April 13th is the day in 1204 that Constantinople falls to the Crusaders of the Fourth Crusade, temporarily ending the Byzantine Empire.