Hecho general: 1722 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 1722 is a boring number.
Trivia: 1722 is a boring number.
Fecha histórica: September 17th is the day in 1462 that the Battle of Świecino (also known as the Battle of Żarnowiec) is fought during Thirteen Years' War.