Fatto generale: 50981 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 50981 is an unremarkable number.
Trivia: 50981 is a boring number.
Data storica: July 31st is the day in 1956 that Jim Laker becomes the first man to take all 10 wickets in a Test match innings as he returns figures of 10/53 in the Australian 2nd innings.