The number 55816
55816 is a composite number with 8 divisors. Its prime factorisation is × 6977. Divisors (8): 1, 2, 4, 8, 6977, 13954, 27908, 55816.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55816 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55816 is composite. Its prime factorisation is
- 3
The divisors add up to 104670; without 55816 itself that is 48854, so 55816 is deficient (48854 is less than 55816). Euler's totient φ(55816) = 27904 numbers up to 55816 share no factor with it.
- 4
The digits of 55816 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 34 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55816 = 2^{3} \times 6977 \]55816 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 104670 |
| Euler totient φ(n) | 27904 |
| Square | 3115425856 |
| Cube | 173890609578496 |
| Square root | 236.254100 (= 2√13954) |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 34 |
| Scientific notation | 5.5816 × |
55816 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand eight hundred and sixteen |
| Binary (base 2) | 1101101000001000 |
| Octal (base 8) | 155010 |
| Hexadecimal (base 16) | DA08 |
| Base 3 | 2211120021 |
| As time | 55816 seconds = 15 h 30 min 16 s |
Is 55816 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55816 ÷ 2 = 27908) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (55816 ÷ 4 = 13954) | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 | Yes (55816 ÷ 8 = 6977) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 4) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55816 a prime number?
No. 55816 = × 6977, so it is divisible by 2.
What are the factors of 55816?
1, 2, 4, 8, 6977, 13954, 27908, 55816.
What is 55816 in binary?
1101101000001000 (hexadecimal DA08, octal 155010).
What is the square root of 55816?
About 236.2541, exactly 2√13954.
Is 55816 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 55816?
It is a composite number with 8 divisors.