The number 31450
31450 is a composite number with 24 divisors. Its prime factorisation is 2 × × 17 × 37. Divisors (24): 1, 2, 5, 10, 17, 25, 34, 37, 50, 74, 85, 170, 185, 370, 425, 629 … 31450.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31450 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31450 is composite. Its prime factorisation is
- 3
The divisors add up to 63612; without 31450 itself that is 32162, so 31450 is abundant (32162 is more than 31450). Euler's totient φ(31450) = 11520 numbers up to 31450 share no factor with it.
- 4
The digits of 31450 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 85 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31450 = 2 \times 5^{2} \times 17 \times 37 \]31450 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 63612 |
| Euler totient φ(n) | 11520 |
| Square | 989102500 |
| Cube | 31107273625000 |
| Square root | 177.341479 (= 5√1258) |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 85 |
| Scientific notation | 3.145 × |
31450 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and fifty |
| Binary (base 2) | 111101011011010 |
| Octal (base 8) | 75332 |
| Hexadecimal (base 16) | 7ADA |
| Base 3 | 1121010211 |
| As time | 31450 seconds = 8 h 44 min 10 s |
Is 31450 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31450 ÷ 2 = 15725) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (31450 ÷ 5 = 6290) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (31450 ÷ 10 = 3145) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31450 a prime number?
No. 31450 = 2 × × 17 × 37, so it is divisible by 2.
What are the factors of 31450?
1, 2, 5, 10, 17, 25, 34, 37, 50, 74, 85, 170, 185, 370, 425, 629, 850, 925, 1258, 1850, 3145, 6290, 15725, 31450.
What is 31450 in binary?
111101011011010 (hexadecimal 7ADA, octal 75332).
What is the square root of 31450?
About 177.3415, exactly 5√1258.
Is 31450 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 31450?
It is a composite number with 24 divisors.