21,516 in words
21,516
twenty-one thousand five hundred sixteen
21,516 is written twenty-one thousand five hundred sixteen.
Ways to write it
- As an ordinal
- twenty-one thousand five hundred sixteenth
- Expanded form
- 20,000 + 1,000 + 500 + 10 + 6
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 5 | 500 |
| tens | 1 | 10 |
| ones | 6 | 6 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132, 163, 326, 489, 652, 978, 1,793, 1,956, 3,586, 5,379, 7,172, 10,758 and 21,516 (24 factors)
- First 10 multiples
- 21,516, 43,032, 64,548, 86,064, 107,580, 129,096, 150,612, 172,128, 193,644, 215,160
- Square
- 21,516 × 21,516 = 462,938,256
- Square root
- ≈ 146.68
- Sum of the digits
- 2 + 1 + 5 + 1 + 6 = 15
- Rounded to the nearest 10
- 21,520
- Rounded to the nearest 100
- 21,500
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,515
- Number after
- 21,517
- In binary
101010000001100
Quick check
What number comes just after 21,516?
Show the answer
21,517
Is 21,516 even or odd?
Show the answer
Even
What is 21,516 + 10?
Show the answer
21,526
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 21,516 in words?
21,516 is written "twenty-one thousand five hundred sixteen".
Is 21,516 a prime number?
No. 21,516 is a composite number, because it has more than two factors.
What are the factors of 21,516?
The factors of 21,516 are 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132, 163, 326, 489, 652, 978, 1,793, 1,956, 3,586, 5,379, 7,172, 10,758 and 21,516.