The number 38131
38131 is a composite number with 4 divisors. Its prime factorisation is 17 × 2243. Divisors (4): 1, 17, 2243, 38131.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38131: a semiprime: 17 × 2243, the product of two primes.
- 2
38131 is composite. Its prime factorisation is
- 3
The divisors add up to 40392; without 38131 itself that is 2261, so 38131 is deficient (2261 is less than 38131). Euler's totient φ(38131) = 35872 numbers up to 38131 share no factor with it.
- 4
The digits of 38131 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 62 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38131 = 17 \times 2243 \]
38131 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 40392 |
| Euler totient φ(n) | 35872 |
| Square | 1453973161 |
| Cube | 55441450602091 |
| Square root | 195.271606 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 62 |
| Scientific notation | 3.8131 × |
38131 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand one hundred and thirty-one |
| Binary (base 2) | 1001010011110011 |
| Octal (base 8) | 112363 |
| Hexadecimal (base 16) | 94F3 |
| Base 3 | 1221022021 |
| As time | 38131 seconds = 10 h 35 min 31 s |
Is 38131 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 1) | 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 7) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38131 a prime number?
No. 38131 = 17 × 2243, so it is divisible by 17.
What are the factors of 38131?
1, 17, 2243, 38131.
What is 38131 in binary?
1001010011110011 (hexadecimal 94F3, octal 112363).
What is the square root of 38131?
About 195.2716.
Is 38131 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 38131?
38131 is a semiprime: 17 × 2243, the product of two primes.