The number 55818
55818 is a composite number with 24 divisors. Its prime factorisation is 2 × × 7 × 443. Divisors (24): 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 443, 886, 1329, 2658 … 55818.
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How to work it out
- 1
55818 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55818 is composite. Its prime factorisation is
- 3
The divisors add up to 138528; without 55818 itself that is 82710, so 55818 is abundant (82710 is more than 55818). Euler's totient φ(55818) = 15912 numbers up to 55818 share no factor with it.
- 4
The digits of 55818 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 34 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55818 = 2 \times 3^{2} \times 7 \times 443 \]55818 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 138528 |
| Euler totient φ(n) | 15912 |
| Square | 3115649124 |
| Cube | 173909302803432 |
| Square root | 236.258333 (= 3√6202) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 34 |
| Scientific notation | 5.5818 × |
55818 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand eight hundred and eighteen |
| Binary (base 2) | 1101101000001010 |
| Octal (base 8) | 155012 |
| Hexadecimal (base 16) | DA0A |
| Base 3 | 2211120100 |
| As time | 55818 seconds = 15 h 30 min 18 s |
Is 55818 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55818 ÷ 2 = 27909) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (55818 ÷ 3 = 18606) | 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 | Yes (55818 ÷ 6 = 9303) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (55818 ÷ 7 = 7974) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | Yes (55818 ÷ 9 = 6202) | 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55818 a prime number?
No. 55818 = 2 × × 7 × 443, so it is divisible by 2.
What are the factors of 55818?
1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 443, 886, 1329, 2658, 3101, 3987, 6202, 7974, 9303, 18606, 27909, 55818.
What is 55818 in binary?
1101101000001010 (hexadecimal DA0A, octal 155012).
What is the square root of 55818?
About 236.2583, exactly 3√6202.
Is 55818 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 55818?
It is a composite number with 24 divisors.