CLXXI

CLXXI is the Roman numeral representation for the number one hundred and seventy‑one (171). In the Roman numeral system, CLXXI is composed of the symbols C (100), L (50), X (10), another X (10) and I (1). The positions of L, X and the first X represent additive combinations of 50, 10 and 10, respectively, while the placement of C before L would have indicated a subtraction, but in this case C follows L, so all values are added. The numeral thus appears as 100 + 50 + 10 + 10 + 1.

In ancient Rome, numbers were written on stone, bronze, and other media for dates, counts of coinage, and administrative records. The year 171 CE (AD) is noted in Roman inscriptions related to the reign of Emperor Marcus Aurelius. The year 171 BCE is less frequently recorded but appears in certain Greek and Roman annals. The numeral CLXXI may appear in medieval manuscripts numbering chapters or sections, and in modern times it is occasionally used in legal or academic contexts to number lists or subsections.

The Roman numeral system uses a combination of seven basic symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). Numbers are formed by placing symbols in descending order, with additions indicating a simple sum and placements of smaller values before larger ones indicating subtraction. Thus, CLXXI fits the additive rule, and its construction reflects standardized Roman numeral conventions.

Related concepts include other number representations such as Arabic numerals (171), Greek numerals, and modern numbering systems used for enumeration in various disciplines. The numeral CLXXI remains a concise example of Latin numeric notation and its continued application in classification and cataloguing.