CCCXLIII

CCCXLIII is the Roman numeral representing the integer 343. It is formed by combining CCC (300) with XL (40) and III (3), yielding 343 in the additive-subtractive system used by ancient Rome.

In mathematics, 343 is notable as a perfect cube, specifically 7 cubed (7^3). Its prime factorization is 7^3, and its positive divisors are 1, 7, 49, and 343. This makes 343 a small composite number with a simple, repeated prime structure.

Historically, Roman numerals like CCCXLIII were used for counting, inscriptions, and dating events. In modern usage, Roman numerals continue to appear on clock faces, outlines and chapter headings in books, movie credits, or as stylistic designations for monarchs, popes, or legislative items. While CCCXLIII is not a commonly singled-out designation in contemporary naming, it stands as a valid numeral that could be used in any context requiring the representation of the number 343.

As a year label, CCCXLIII would refer to the year 343 CE (or 343 BCE in a different era system), placing it in late antiquity for the Common Era interpretation. In related topics, the number 343’s property as a cube of seven is a frequent point of interest in elementary number theory.

See also: Roman numerals, 343, 7^3.