CCXXXI
CCXXXI is the Roman numeral representation of the number 231 in the Gregorian calendar system. The numeral is constructed using three Roman symbols: C, X, and I. The symbol C represents 100, X represents 10, and I represents 1. The placement of these symbols follows the additive principle of Roman numerals, where symbols of equal or lesser value are placed to the right of a symbol of greater value and their values are added. Therefore, CCXXXI is interpreted as C + C + X + X + X + I, which translates to 100 + 100 + 10 + 10 + 10 + 1. This summation results in the total value of 231. Roman numerals were historically used in ancient Rome and continued to be employed for centuries afterward in various contexts, including numbering chapters, identifying monarchs, and denoting dates. The formation of CCXXXI adheres to the standard rules of Roman numeral notation, demonstrating a clear and systematic way to express numerical quantities.