Fatto generale: 55307 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 55307 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 55307 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: June 4th is the day in 1957 that Dr. Martin Luther King, Jr. delivered his famous Power of Nonviolence speech at the University of California, Berkeley.