General fact: 230 is the country code for Mauritius.
Mathematical fact: 230 is a composite number, with its divisors being 2, 5, 10, 23, 46, and 115.
Trivia: 230 is the common voltage in the European Union.
Historical date: August 17th is the day in 986 that a Byzantine army is destroyed in the pass of Trajan's Gate by the Bulgarians under the Comitopuli Samuel and Aron.