General fact: 36521 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 36521 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 36521 is an uninteresting number.
Historical date: December 28th is the day in 1935 that Pravda publishes a letter by Pavel Postyshev, who revives New Year tree tradition in the Soviet Union.