The number 55187
55187 is a composite number with 8 divisors. Its prime factorisation is 11 × 29 × 173. Divisors (8): 1, 11, 29, 173, 319, 1903, 5017, 55187.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55187 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55187 is composite. Its prime factorisation is
- 3
The divisors add up to 62640; without 55187 itself that is 7453, so 55187 is deficient (7453 is less than 55187). Euler's totient φ(55187) = 48160 numbers up to 55187 share no factor with it.
- 4
The digits of 55187 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 140 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55187 = 11 \times 29 \times 173 \]
55187 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 62640 |
| Euler totient φ(n) | 48160 |
| Square | 3045604969 |
| Cube | 168077801424203 |
| Square root | 234.919135 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 140 |
| Scientific notation | 5.5187 × |
55187 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and eighty-seven |
| Binary (base 2) | 1101011110010011 |
| Octal (base 8) | 153623 |
| Hexadecimal (base 16) | D793 |
| Base 3 | 2210200222 |
| As time | 55187 seconds = 15 h 19 min 47 s |
Is 55187 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 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 5) | 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 8) | 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 | Yes (55187 ÷ 11 = 5017) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55187 a prime number?
No. 55187 = 11 × 29 × 173, so it is divisible by 11.
What are the factors of 55187?
1, 11, 29, 173, 319, 1903, 5017, 55187.
What is 55187 in binary?
1101011110010011 (hexadecimal D793, octal 153623).
What is the square root of 55187?
About 234.9191.
Is 55187 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 55187?
It is a composite number with 8 divisors.