The number 55185
55185 is a composite number with 16 divisors. Its prime factorisation is 3 × 5 × 13 × 283. Divisors (16): 1, 3, 5, 13, 15, 39, 65, 195, 283, 849, 1415, 3679, 4245, 11037, 18395, 55185.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55185 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55185 is composite. Its prime factorisation is
- 3
The divisors add up to 95424; without 55185 itself that is 40239, so 55185 is deficient (40239 is less than 55185). Euler's totient φ(55185) = 27072 numbers up to 55185 share no factor with it.
- 4
The digits of 55185 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 140 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55185 = 3 \times 5 \times 13 \times 283 \]
55185 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 95424 |
| Euler totient φ(n) | 27072 |
| Square | 3045384225 |
| Cube | 168059528456625 |
| Square root | 234.914878 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 140 |
| Scientific notation | 5.5185 × |
55185 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and eighty-five |
| Binary (base 2) | 1101011110010001 |
| Octal (base 8) | 153621 |
| Hexadecimal (base 16) | D791 |
| Base 3 | 2210200220 |
| As time | 55185 seconds = 15 h 19 min 45 s |
Is 55185 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 (55185 ÷ 3 = 18395) | 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 | Yes (55185 ÷ 5 = 11037) | 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 1) | 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 5) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55185 a prime number?
No. 55185 = 3 × 5 × 13 × 283, so it is divisible by 3.
What are the factors of 55185?
1, 3, 5, 13, 15, 39, 65, 195, 283, 849, 1415, 3679, 4245, 11037, 18395, 55185.
What is 55185 in binary?
1101011110010001 (hexadecimal D791, octal 153621).
What is the square root of 55185?
About 234.9149.
Is 55185 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 55185?
It is a composite number with 16 divisors.