Hecho general: 61533 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 61533 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 61533 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: June 20th is the day in 1895 that the Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.