Fatto generale: 43181 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 43181 is an unremarkable number.
Trivia: 43181 is a boring number.
Data storica: March 23rd is the day in 1980 that Archbishop Óscar Romero of El Salvador gives his famous speech appealing to men of the El Salvadoran armed forces to stop killing the Salvadorans.