The number 33731
33731 is a composite number with 4 divisors. Its prime factorisation is 89 × 379. Divisors (4): 1, 89, 379, 33731.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 33731: a semiprime: 89 × 379, the product of two primes.
- 2
33731 is composite. Its prime factorisation is
- 3
The divisors add up to 34200; without 33731 itself that is 469, so 33731 is deficient (469 is less than 33731). Euler's totient φ(33731) = 33264 numbers up to 33731 share no factor with it.
- 4
The digits of 33731 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 67 steps to reach 1.
LaTeX source of the formulas on this page
\[ 33731 = 89 \times 379 \]
33731 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 34200 |
| Euler totient φ(n) | 33264 |
| Square | 1137780361 |
| Cube | 38378469356891 |
| Square root | 183.660012 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 67 |
| Scientific notation | 3.3731 × |
33731 in other forms
| Form | Value |
|---|---|
| In words | thirty-three thousand seven hundred and thirty-one |
| Binary (base 2) | 1000001111000011 |
| Octal (base 8) | 101703 |
| Hexadecimal (base 16) | 83C3 |
| Base 3 | 1201021022 |
| As time | 33731 seconds = 9 h 22 min 11 s |
Is 33731 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 33731 a prime number?
No. 33731 = 89 × 379, so it is divisible by 89.
What are the factors of 33731?
1, 89, 379, 33731.
What is 33731 in binary?
1000001111000011 (hexadecimal 83C3, octal 101703).
What is the square root of 33731?
About 183.6600.
Is 33731 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 33731?
33731 is a semiprime: 89 × 379, the product of two primes.