The number 55791
55791 is a composite number with 6 divisors. Its prime factorisation is × 6199. Divisors (6): 1, 3, 9, 6199, 18597, 55791.
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How to work it out
- 1
55791 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55791 is composite. Its prime factorisation is
- 3
The divisors add up to 80600; without 55791 itself that is 24809, so 55791 is deficient (24809 is less than 55791). Euler's totient φ(55791) = 37188 numbers up to 55791 share no factor with it.
- 4
The digits of 55791 add up to 27, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55791 = 3^{2} \times 6199 \]55791 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 80600 |
| Euler totient φ(n) | 37188 |
| Square | 3112635681 |
| Cube | 173657057278671 |
| Square root | 236.201185 (= 3√6199) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 91 |
| Scientific notation | 5.5791 × |
55791 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand seven hundred and ninety-one |
| Binary (base 2) | 1101100111101111 |
| Octal (base 8) | 154757 |
| Hexadecimal (base 16) | D9EF |
| Base 3 | 2211112100 |
| As time | 55791 seconds = 15 h 29 min 51 s |
Is 55791 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 | Yes (55791 ÷ 3 = 18597) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (55791 ÷ 9 = 6199) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55791 a prime number?
No. 55791 = × 6199, so it is divisible by 3.
What are the factors of 55791?
1, 3, 9, 6199, 18597, 55791.
What is 55791 in binary?
1101100111101111 (hexadecimal D9EF, octal 154757).
What is the square root of 55791?
About 236.2012, exactly 3√6199.
Is 55791 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 55791?
It is a composite number with 6 divisors.