The number 83131
83131 is a composite number with 4 divisors. Its prime factorisation is 59 × 1409. Divisors (4): 1, 59, 1409, 83131.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 83131: a semiprime: 59 × 1409, the product of two primes.
- 2
83131 is composite. Its prime factorisation is
- 3
The divisors add up to 84600; without 83131 itself that is 1469, so 83131 is deficient (1469 is less than 83131). Euler's totient φ(83131) = 81664 numbers up to 83131 share no factor with it.
- 4
The digits of 83131 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 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 83131 = 59 \times 1409 \]
83131 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 84600 |
| Euler totient φ(n) | 81664 |
| Square | 6910763161 |
| Cube | 574498652337091 |
| Square root | 288.324470 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 76 |
| Scientific notation | 8.3131 × |
83131 in other forms
| Form | Value |
|---|---|
| In words | eighty-three thousand one hundred and thirty-one |
| Binary (base 2) | 10100010010111011 |
| Octal (base 8) | 242273 |
| Hexadecimal (base 16) | 144BB |
| Base 3 | 11020000221 |
| As time | 83131 seconds = 23 h 5 min 31 s |
Is 83131 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 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 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 4) | 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 83131 a prime number?
No. 83131 = 59 × 1409, so it is divisible by 59.
What are the factors of 83131?
1, 59, 1409, 83131.
What is 83131 in binary?
10100010010111011 (hexadecimal 144BB, octal 242273).
What is the square root of 83131?
About 288.3245.
Is 83131 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 83131?
83131 is a semiprime: 59 × 1409, the product of two primes.