The number 83081
83081 is a composite number with 4 divisors. Its prime factorisation is 251 × 331. Divisors (4): 1, 251, 331, 83081.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 83081: a semiprime: 251 × 331, the product of two primes.
- 2
83081 is composite. Its prime factorisation is
- 3
The divisors add up to 83664; without 83081 itself that is 583, so 83081 is deficient (583 is less than 83081). Euler's totient φ(83081) = 82500 numbers up to 83081 share no factor with it.
- 4
The digits of 83081 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 226 steps to reach 1.
LaTeX source of the formulas on this page
\[ 83081 = 251 \times 331 \]
83081 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 83664 |
| Euler totient φ(n) | 82500 |
| Square | 6902452561 |
| Cube | 573462661220441 |
| Square root | 288.237749 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 226 |
| Scientific notation | 8.3081 × |
83081 in other forms
| Form | Value |
|---|---|
| In words | eighty-three thousand and eighty-one |
| Binary (base 2) | 10100010010001001 |
| Octal (base 8) | 242211 |
| Hexadecimal (base 16) | 14489 |
| Base 3 | 11012222002 |
| As time | 83081 seconds = 23 h 4 min 41 s |
Is 83081 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 1) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 83081 a prime number?
No. 83081 = 251 × 331, so it is divisible by 251.
What are the factors of 83081?
1, 251, 331, 83081.
What is 83081 in binary?
10100010010001001 (hexadecimal 14489, octal 242211).
What is the square root of 83081?
About 288.2377.
Is 83081 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 83081?
83081 is a semiprime: 251 × 331, the product of two primes.