Hecho general: 81683 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 81683 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 81683 is a boring number.
Fecha histórica: August 22nd is the day in 1639 that Madras (now Chennai), India, is founded by the British East India Company on a sliver of land bought from local Nayak rulers.