What does CDLXXI mean?

CDLXXI is the Roman numeral for 471 — 400 + 50 + 10 + 10 + 1.

How do you write 471 in Roman numerals?

Take the largest value that fits and repeat until nothing is left: CD (400), then L (50), then X (10), then X (10), then I (1). That gives CDLXXI.

471 in Roman numerals

CDLXXI

Number (1–3,999 for numerals)

Roman numeral

471 is written CDLXXI in Roman numerals. That is 5 symbol groups added together, reading left to right from the largest value down.

How it breaks down

CDLXXI = 400 + 50 + 10 + 10 + 1 = 471
Group	Value	Subtraction	Running total
CD	400	D − C	400
L	50	—	450
X	10	—	460
X	10	—	470
I	1	—	471

Why the smaller symbol comes first

CDLXXI uses subtractive notation in one place: CD means D minus C, or 400. A smaller symbol placed before a larger one is subtracted from it rather than added, which is why IX is nine and not eleven.

Only six such pairs are valid — IV, IX, XL, XC, CD and CM. That restriction is what makes the notation unambiguous: IIII and IC both look like they should work, but neither is standard, and only one spelling of any number is correct.

The symbols

Symbol	Value	Used here
I	1	yes — 1×
V	5	no
X	10	yes — 2×
L	50	yes — 1×
C	100	yes — 1×
D	500	yes — 1×
M	1,000	no

The same number, other ways

In words: Four hundred seventy-one
Roman numeral: CDLXXI
Symbol count: 6 characters
Binary: 111010111
Hexadecimal: 1D7

The numbers either side

Number	Roman numeral
469	CDLXIX
470	CDLXX
471	CDLXXI ←
472	CDLXXII
473	CDLXXIII

Common questions

What is 471 in Roman numerals?: 471 is CDLXXI.
What does CDLXXI mean?: CDLXXI is the Roman numeral for 471 — 400 + 50 + 10 + 10 + 1.
How do you write 471 in Roman numerals?: Take the largest value that fits and repeat until nothing is left: CD (400), then L (50), then X (10), then X (10), then I (1). That gives CDLXXI.

Sources

Calculated on this page — At One Place

How these figures are compiled and checked