The number 55858
55858 is a composite number with 8 divisors. Its prime factorisation is 2 × 11 × 2539. Divisors (8): 1, 2, 11, 22, 2539, 5078, 27929, 55858.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55858: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
55858 is composite. Its prime factorisation is
- 3
The divisors add up to 91440; without 55858 itself that is 35582, so 55858 is deficient (35582 is less than 55858). Euler's totient φ(55858) = 25380 numbers up to 55858 share no factor with it.
- 4
The digits of 55858 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55858 = 2 \times 11 \times 2539 \]
55858 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 91440 |
| Euler totient φ(n) | 25380 |
| Square | 3120116164 |
| Cube | 174283448688712 |
| Square root | 236.342971 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 91 |
| Scientific notation | 5.5858 × |
55858 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand eight hundred and fifty-eight |
| Binary (base 2) | 1101101000110010 |
| Octal (base 8) | 155062 |
| Hexadecimal (base 16) | DA32 |
| Base 3 | 2211121211 |
| As time | 55858 seconds = 15 h 30 min 58 s |
Is 55858 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55858 ÷ 2 = 27929) | 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 | 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 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 | No (remainder 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 | Yes (55858 ÷ 11 = 5078) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55858 a prime number?
No. 55858 = 2 × 11 × 2539, so it is divisible by 2.
What are the factors of 55858?
1, 2, 11, 22, 2539, 5078, 27929, 55858.
What is 55858 in binary?
1101101000110010 (hexadecimal DA32, octal 155062).
What is the square root of 55858?
About 236.3430.
Is 55858 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 55858?
55858 is a happy number: repeatedly adding the squares of its digits reaches 1.