Fatto generale: 5563 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5563 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 5563 is an unremarkable number.
Data storica: March 25th is the day in 1811 that Percy Bysshe Shelley is expelled from the University of Oxford for publishing the pamphlet The Necessity of Atheism.