CCXXII

CCXXII is the Roman numeral representation of the integer two hundred and twenty‑two (222). In the Roman system, the symbol CC denotes two hundred, while XXII represents twenty‑two, thus combining to form 222. The numeral follows the standard conventions of subtractive notation, although no subtractive forms appear in this particular number.

Mathematically, 222 is a composite number with the prime factorization 2 × 3 × 37. It is an even, palindromic number in decimal notation and has a digital sum of six (2+2+2). The number is not a prime, perfect, or triangular number, but it is a self‑number in base ten, meaning it cannot be expressed as the sum of another number and its own digits. In binary, CCXXII equals 11011110₂, and in hexadecimal it is D6₁₆.

Historically, the year 222 AD was marked by political events in the Roman Empire, including the reign of Emperor Alexander Severus. The year 222 BCE falls within the early Hellenistic period, a time characterized by the expansion of Greek culture across the Mediterranean. In modern times, the designation CCXXII has occasionally been used as a model number or part label in engineering contexts, though it is not widely recognized beyond specialized references.

The numeral CCXXII thus serves as both a straightforward numeric value in Roman notation and a reference point in various historical, mathematical, and applied settings.