31,009 in words
31,009
thirty-one thousand nine
31,009 is written thirty-one thousand nine.
Ways to write it
- As an ordinal
- thirty-one thousand ninth
- Expanded form
- 30,000 + 1,000 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 3 | 30,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 0 | 0 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 11, 2,819 and 31,009 (4 factors)
- First 10 multiples
- 31,009, 62,018, 93,027, 124,036, 155,045, 186,054, 217,063, 248,072, 279,081, 310,090
- Square
- 31,009 × 31,009 = 961,558,081
- Square root
- ≈ 176.09
- Sum of the digits
- 3 + 1 + 0 + 0 + 9 = 13
- Rounded to the nearest 10
- 31,010
- Rounded to the nearest 100
- 31,000
- Rounded to the nearest 1000
- 31,000
- Number before
- 31,008
- Number after
- 31,010
- In binary
111100100100001
Quick check
What number comes just after 31,009?
Show the answer
31,010
Is 31,009 even or odd?
Show the answer
Odd
What is 31,009 + 10?
Show the answer
31,019
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 31,009 in words?
31,009 is written "thirty-one thousand nine".
Is 31,009 a prime number?
No. 31,009 is a composite number, because it has more than two factors.
What are the factors of 31,009?
The factors of 31,009 are 1, 11, 2,819 and 31,009.