21,471 in words
21,471
twenty-one thousand four hundred seventy-one
21,471 is written twenty-one thousand four hundred seventy-one.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred seventy-first
- Expanded form
- 20,000 + 1,000 + 400 + 70 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 7 | 70 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 17, 51, 421, 1,263, 7,157 and 21,471 (8 factors)
- First 10 multiples
- 21,471, 42,942, 64,413, 85,884, 107,355, 128,826, 150,297, 171,768, 193,239, 214,710
- Square
- 21,471 × 21,471 = 461,003,841
- Square root
- ≈ 146.53
- Sum of the digits
- 2 + 1 + 4 + 7 + 1 = 15
- Rounded to the nearest 10
- 21,470
- Rounded to the nearest 100
- 21,500
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,470
- Number after
- 21,472
- In binary
101001111011111
Quick check
What number comes just after 21,471?
Show the answer
21,472
Is 21,471 even or odd?
Show the answer
Odd
What is 21,471 + 10?
Show the answer
21,481
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 21,471 in words?
21,471 is written "twenty-one thousand four hundred seventy-one".
Is 21,471 a prime number?
No. 21,471 is a composite number, because it has more than two factors.
What are the factors of 21,471?
The factors of 21,471 are 1, 3, 17, 51, 421, 1,263, 7,157 and 21,471.