General fact: 51672 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 51672 is an uninteresting number.
Trivia: 51672 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: June 21st is the day in 1940 that the first successful west-to-east navigation of Northwest Passage begins at Vancouver, British Columbia, Canada.