Fatto matematico: 4155 is 4^{5} + 1^{5} + 5^{5} + 5.
Trivia: 4155 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: May 17th is the day in 1954 that the United States Supreme Court hands down a unanimous decision in Brown v. Board of Education of Topeka, Kansas.