Fait général: 5143 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 5143 is 555 + 111 + 4444 + 33.
Culture générale: 5143 is an unremarkable number.
Date historique: January 29th is the day in 1941 that Alexandros Koryzis becomes Prime Minister of Greece upon the sudden death of his predecessor, dictator Ioannis Metaxas.