Hecho general: 1567 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 1567 is a boring number.
Trivia: 1567 is an uninteresting number.
Fecha histórica: April 15th is the day in 1989 that Upon Hu Yaobang's death, the Tiananmen Square protests of 1989 begin in the People's Republic of China.