Fatto generale: 50311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 50311 is an unremarkable number.
Trivia: 50311 is an unremarkable number.
Data storica: September 29th is the day in 1979 that Pope John Paul II becomes the first pope to set foot on Irish soil with his pastoral visit to the Republic of Ireland.