The number 55491
55491 is a composite number with 8 divisors. Its prime factorisation is 3 × 53 × 349. Divisors (8): 1, 3, 53, 159, 349, 1047, 18497, 55491.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55491 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55491 is composite. Its prime factorisation is
- 3
The divisors add up to 75600; without 55491 itself that is 20109, so 55491 is deficient (20109 is less than 55491). Euler's totient φ(55491) = 36192 numbers up to 55491 share no factor with it.
- 4
The digits of 55491 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55491 = 3 \times 53 \times 349 \]
55491 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 75600 |
| Euler totient φ(n) | 36192 |
| Square | 3079251081 |
| Cube | 170870721735771 |
| Square root | 235.565278 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.5491 × |
55491 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand four hundred and ninety-one |
| Binary (base 2) | 1101100011000011 |
| Octal (base 8) | 154303 |
| Hexadecimal (base 16) | D8C3 |
| Base 3 | 2211010020 |
| As time | 55491 seconds = 15 h 24 min 51 s |
Is 55491 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 (55491 ÷ 3 = 18497) | 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 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 6) | 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 7) | 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 55491 a prime number?
No. 55491 = 3 × 53 × 349, so it is divisible by 3.
What are the factors of 55491?
1, 3, 53, 159, 349, 1047, 18497, 55491.
What is 55491 in binary?
1101100011000011 (hexadecimal D8C3, octal 154303).
What is the square root of 55491?
About 235.5653.
Is 55491 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 55491?
It is a composite number with 8 divisors.