581 in words
581
five hundred and eighty-one
581 is written five hundred and eighty-one.
Ways to write it
- As an ordinal
- five hundred and eighty-first
- Roman numeral
- DLXXXI
- Expanded form
- 500 + 80 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 5 | 500 |
| tens | 8 | 80 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 83 and 581 (4 factors)
- First 10 multiples
- 581, 1,162, 1,743, 2,324, 2,905, 3,486, 4,067, 4,648, 5,229, 5,810
- Square
- 581 × 581 = 337,561
- Square root
- ≈ 24.10
- Sum of the digits
- 5 + 8 + 1 = 14
- Rounded to the nearest 10
- 580
- Rounded to the nearest 100
- 600
- Number before
- 580
- Number after
- 582
- In binary
1001000101
Quick check
What number comes just after 581?
Show the answer
582
Is 581 even or odd?
Show the answer
Odd
What is 581 + 10?
Show the answer
591
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 581 in words?
581 is written "five hundred and eighty-one".
Is 581 a prime number?
No. 581 is a composite number, because it has more than two factors.
What are the factors of 581?
The factors of 581 are 1, 7, 83 and 581.
How do you write 581 in Roman numerals?
581 in Roman numerals is DLXXXI.