The number 55647
55647 is a composite number with 12 divisors. Its prime factorisation is × 229. Divisors (12): 1, 3, 9, 27, 81, 229, 243, 687, 2061, 6183, 18549, 55647.
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How to work it out
- 1
What is special about 55647: a Harshad number: divisible by its digit sum 27.
- 2
55647 is composite. Its prime factorisation is
- 3
The divisors add up to 83720; without 55647 itself that is 28073, so 55647 is deficient (28073 is less than 55647). Euler's totient φ(55647) = 36936 numbers up to 55647 share no factor with it.
- 4
The digits of 55647 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
\[ 55647 = 3^{5} \times 229 \]55647 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 83720 |
| Euler totient φ(n) | 36936 |
| Square | 3096588609 |
| Cube | 172315866325023 |
| Square root | 235.896164 (= 9√687) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 91 |
| Scientific notation | 5.5647 × |
55647 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand six hundred and forty-seven |
| Binary (base 2) | 1101100101011111 |
| Octal (base 8) | 154537 |
| Hexadecimal (base 16) | D95F |
| Base 3 | 2211100000 |
| As time | 55647 seconds = 15 h 27 min 27 s |
Is 55647 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 (55647 ÷ 3 = 18549) | 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 2) | 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 4) | 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 (55647 ÷ 9 = 6183) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55647 a prime number?
No. 55647 = × 229, so it is divisible by 3.
What are the factors of 55647?
1, 3, 9, 27, 81, 229, 243, 687, 2061, 6183, 18549, 55647.
What is 55647 in binary?
1101100101011111 (hexadecimal D95F, octal 154537).
What is the square root of 55647?
About 235.8962, exactly 9√687.
Is 55647 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 55647?
55647 is a Harshad number: divisible by its digit sum 27.