Hecho matemático: 5252 is the maximum number of regions space can be divided into by 26 spheres.
Trivia: 5252 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: May 18th is the day in 1783 that First United Empire Loyalists reach Parrtown (later called Saint John), New Brunswick, Canada after leaving the United States.