Fatto generale: 231 is the number of cubic inches in a U.S. liquid gallon.
Fatto matematico: 231 is the number of partitions of 16.
Trivia: 231 is the number of cubic inches in a U.S. liquid gallon.
Data storica: August 18th is the day in 1590 that John White, the governor of the Colony of Roanoke, returns from a supply trip to England and finds his settlement deserted.