21,550 in words
21,550
twenty-one thousand five hundred and fifty
21,550 is written twenty-one thousand five hundred and fifty.
Ways to write it
- As an ordinal
- twenty-one thousand five hundred and fiftieth
- Expanded form
- 20,000 + 1,000 + 500 + 50
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 5 | 500 |
| tens | 5 | 50 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 5, 10, 25, 50, 431, 862, 2,155, 4,310, 10,775 and 21,550 (12 factors)
- First 10 multiples
- 21,550, 43,100, 64,650, 86,200, 107,750, 129,300, 150,850, 172,400, 193,950, 215,500
- Square
- 21,550 × 21,550 = 464,402,500
- Square root
- ≈ 146.80
- Sum of the digits
- 2 + 1 + 5 + 5 + 0 = 13
- Rounded to the nearest 10
- 21,550
- Rounded to the nearest 100
- 21,600
- Rounded to the nearest 1000
- 22,000
- Number before
- 21,549
- Number after
- 21,551
- In binary
101010000101110
Quick check
What number comes just after 21,550?
Show the answer
21,551
Is 21,550 even or odd?
Show the answer
Even
What is 21,550 + 10?
Show the answer
21,560
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 21,550 in words?
21,550 is written "twenty-one thousand five hundred and fifty".
Is 21,550 a prime number?
No. 21,550 is a composite number, because it has more than two factors.
What are the factors of 21,550?
The factors of 21,550 are 1, 2, 5, 10, 25, 50, 431, 862, 2,155, 4,310, 10,775 and 21,550.