Hecho matemático: 5525 is the smallest number that can be written as the sum of 2 squares in 6 ways.
Trivia: 5525 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: February 15th is the day in 1946 that ENIAC, the first electronic general-purpose computer, is formally dedicated at the University of Pennsylvania in Philadelphia.