General fact: 13516 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 13516 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 13516 is an unremarkable number.
Historical date: January 1st is the day in 1964 that the Federation of Rhodesia and Nyasaland is divided into the independent republics of Zambia and Malawi, and the British-controlled Rhodesia.