The number 55118
55118 is a composite number with 16 divisors. Its prime factorisation is 2 × 7 × 31 × 127. Divisors (16): 1, 2, 7, 14, 31, 62, 127, 217, 254, 434, 889, 1778, 3937, 7874, 27559, 55118.
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How to work it out
- 1
55118 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55118 is composite. Its prime factorisation is
- 3
The divisors add up to 98304; without 55118 itself that is 43186, so 55118 is deficient (43186 is less than 55118). Euler's totient φ(55118) = 22680 numbers up to 55118 share no factor with it.
- 4
The digits of 55118 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 140 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55118 = 2 \times 7 \times 31 \times 127 \]
55118 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 98304 |
| Euler totient φ(n) | 22680 |
| Square | 3037993924 |
| Cube | 167448149103032 |
| Square root | 234.772230 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 140 |
| Scientific notation | 5.5118 × |
55118 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and eighteen |
| Binary (base 2) | 1101011101001110 |
| Octal (base 8) | 153516 |
| Hexadecimal (base 16) | D74E |
| Base 3 | 2210121102 |
| As time | 55118 seconds = 15 h 18 min 38 s |
Is 55118 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55118 ÷ 2 = 27559) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (55118 ÷ 7 = 7874) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55118 a prime number?
No. 55118 = 2 × 7 × 31 × 127, so it is divisible by 2.
What are the factors of 55118?
1, 2, 7, 14, 31, 62, 127, 217, 254, 434, 889, 1778, 3937, 7874, 27559, 55118.
What is 55118 in binary?
1101011101001110 (hexadecimal D74E, octal 153516).
What is the square root of 55118?
About 234.7722.
Is 55118 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 55118?
It is a composite number with 16 divisors.