XVII
10 + 5 + 2 = 17
XVII breaks down as X + V + II (X = 10, V = 5, II = 2), which add up to 17.
XVII breaks down as X + V + II (X = 10, V = 5, II = 2), which add up to 17.
The number 17 is written XVII in Roman numerals. Roman numerals use seven letters — I (1), V (5), X (10), L (50), C (100), D (500) and M (1000) — combined from largest to smallest, with subtractive pairs such as IV (4) and IX (9). Need another number? Use the Roman numeral converter or see the 1–100 chart.