521 in Roman Numerals
DXXI
521 in Roman numerals is DXXI, and is spelled five hundred twenty-one.
How to write 521 in Roman numerals
To write 521 in Roman numerals, combine D (500), XX (20) and I (1) to get DXXI.
The numeral DXXI is read from left to right, from the largest value to the smallest, adding each symbol as you go.
| Value | Roman |
|---|---|
| 500 | D |
| 20 | XX |
| 1 | I |
| 521 | DXXI |
Facts about the number 521
- 521 is an odd number.
- 521 is a prime number: it has no divisors other than 1 and itself.
- The digits of 521 add up to 8.
- 521 has 2 divisors.
521 in other number systems
| Decimal | 521 |
| Roman | DXXI |
| Binary | 1000001001 |
| Octal | 1011 |
| Hexadecimal | 209 |
Frequently asked questions
How do you write 521 in Roman numerals?
521 is written as DXXI in Roman numerals.
What does the Roman numeral DXXI mean?
DXXI represents the number 521 (five hundred twenty-one).
Is 521 a prime number?
Yes, 521 is a prime number.
What is 521 in binary and hexadecimal?
521 is 1000001001 in binary and 209 in hexadecimal.
Related numbers
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