Fait général: 5226 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 5226 is the number of ways to color the vertices of a square with 12 colors, up to rotation.
Culture générale: 5226 is an uninteresting number.
Date historique: April 22nd is the day in 1930 that the United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.