Fatto matematico: 5257 is a member of the Fibonacci-type sequence starting with 1 and 8.
Trivia: 5257 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: May 23rd is the day in 1934 that the Auto-Lite Strike culminates in the "Battle of Toledo", a five-day melée between 1,300 troops of the Ohio National Guard and 6,000 picketers.