21,500 in words
21,500
twenty-one thousand five hundred
21,500 is written twenty-one thousand five hundred.
Ways to write it
- As an ordinal
- twenty-one thousand five hundredth
- Expanded form
- 20,000 + 1,000 + 500
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 5 | 500 |
| tens | 0 | 0 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 125, 172, 215, 250, 430, 500, 860, 1,075, 2,150, 4,300, 5,375, 10,750 and 21,500 (24 factors)
- First 10 multiples
- 21,500, 43,000, 64,500, 86,000, 107,500, 129,000, 150,500, 172,000, 193,500, 215,000
- Square
- 21,500 × 21,500 = 462,250,000
- Square root
- ≈ 146.63
- Sum of the digits
- 2 + 1 + 5 + 0 + 0 = 8
- Rounded to the nearest 10
- 21,500
- Rounded to the nearest 100
- 21,500
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,499
- Number after
- 21,501
- In binary
101001111111100
Quick check
What number comes just after 21,500?
Show the answer
21,501
Is 21,500 even or odd?
Show the answer
Even
What is 21,500 + 10?
Show the answer
21,510
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 21,500 in words?
21,500 is written "twenty-one thousand five hundred".
Is 21,500 a prime number?
No. 21,500 is a composite number, because it has more than two factors.
What are the factors of 21,500?
The factors of 21,500 are 1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 125, 172, 215, 250, 430, 500, 860, 1,075, 2,150, 4,300, 5,375, 10,750 and 21,500.