Fatto generale: 4155 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4155 is 4^{5} + 1^{5} + 5^{5} + 5.
Trivia: 4155 is an unremarkable number.
Data storica: May 17th is the day in 1980 that General Chun Doo-hwan of South Korea seizes control of the government and declares martial law in order to suppress student demonstrations.