Fatto generale: 2253 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2253 is the number of monic polynomials of degree 11 with integer coefficients whose complex roots are all in the unit disk.
Trivia: 2253 is an uninteresting number.
Data storica: March 2nd is the day in 1989 that Twelve European Community nations agree to ban the production of all chlorofluorocarbons (CFCs) by the end of the century.