21,173 in words
21,173
twenty-one thousand one hundred seventy-three
21,173 is written twenty-one thousand one hundred seventy-three.
Ways to write it
- As an ordinal
- twenty-one thousand one hundred seventy-third
- Expanded form
- 20,000 + 1,000 + 100 + 70 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 1 | 100 |
| tens | 7 | 70 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 31, 683 and 21,173 (4 factors)
- First 10 multiples
- 21,173, 42,346, 63,519, 84,692, 105,865, 127,038, 148,211, 169,384, 190,557, 211,730
- Square
- 21,173 × 21,173 = 448,295,929
- Square root
- ≈ 145.51
- Sum of the digits
- 2 + 1 + 1 + 7 + 3 = 14
- Rounded to the nearest 10
- 21,170
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,172
- Number after
- 21,174
- In binary
101001010110101
Quick check
What number comes just after 21,173?
Show the answer
21,174
Is 21,173 even or odd?
Show the answer
Odd
What is 21,173 + 10?
Show the answer
21,183
Practice 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 21,173 in words?
21,173 is written "twenty-one thousand one hundred seventy-three".
Is 21,173 a prime number?
No. 21,173 is a composite number, because it has more than two factors.
What are the factors of 21,173?
The factors of 21,173 are 1, 31, 683 and 21,173.