21,055 in words
21,055
twenty-one thousand fifty-five
21,055 is written twenty-one thousand fifty-five.
Ways to write it
- As an ordinal
- twenty-one thousand fifty-fifth
- Expanded form
- 20,000 + 1,000 + 50 + 5
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 5 | 50 |
| ones | 5 | 5 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 5, 4,211 and 21,055 (4 factors)
- First 10 multiples
- 21,055, 42,110, 63,165, 84,220, 105,275, 126,330, 147,385, 168,440, 189,495, 210,550
- Square
- 21,055 × 21,055 = 443,313,025
- Square root
- ≈ 145.10
- Sum of the digits
- 2 + 1 + 0 + 5 + 5 = 13
- Rounded to the nearest 10
- 21,060
- Rounded to the nearest 100
- 21,100
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,054
- Number after
- 21,056
- In binary
101001000111111
Quick check
What number comes just after 21,055?
Show the answer
21,056
Is 21,055 even or odd?
Show the answer
Odd
What is 21,055 + 10?
Show the answer
21,065
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 21,055 in words?
21,055 is written "twenty-one thousand fifty-five".
Is 21,055 a prime number?
No. 21,055 is a composite number, because it has more than two factors.
What are the factors of 21,055?
The factors of 21,055 are 1, 5, 4,211 and 21,055.