Hecho matemático: 2192 is the number of necklaces (that can't be turned over) possible with 15 beads, each being one of 2 colors.
Trivia: 2192 is a boring number.
Fecha histórica: December 31st is the day in 1955 that the General Motors Corporation becomes the first U.S. corporation to make over US$1 billion in a year.