Fatto generale: 1511 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1511 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1511 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 19th is the day in 1600 that the Peruvian stratovolcano Huaynaputina explodes in the most violent eruption in the recorded history of South America.