math_fact: 2922 is the sum of its proper divisors that contain the digit 4.
trivia: 2922 is an unremarkable number.
historical_date: December 31st is the day in 1229 that James I of Aragon the Conqueror enters Medina Mayurqa (now known as Palma, Spain) thus consummating the Christian reconquest of the island of Majorca.