The number 55523
55523 is a composite number with 4 divisors. Its prime factorisation is 13 × 4271. Divisors (4): 1, 13, 4271, 55523.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55523: a semiprime: 13 × 4271, the product of two primes.
- 2
55523 is composite. Its prime factorisation is
- 3
The divisors add up to 59808; without 55523 itself that is 4285, so 55523 is deficient (4285 is less than 55523). Euler's totient φ(55523) = 51240 numbers up to 55523 share no factor with it.
- 4
The digits of 55523 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 34 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55523 = 13 \times 4271 \]
55523 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 59808 |
| Euler totient φ(n) | 51240 |
| Square | 3082803529 |
| Cube | 171166500340667 |
| Square root | 235.633190 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 34 |
| Scientific notation | 5.5523 × |
55523 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand five hundred and twenty-three |
| Binary (base 2) | 1101100011100011 |
| Octal (base 8) | 154343 |
| Hexadecimal (base 16) | D8E3 |
| Base 3 | 2211011102 |
| As time | 55523 seconds = 15 h 25 min 23 s |
Is 55523 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 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 3) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55523 a prime number?
No. 55523 = 13 × 4271, so it is divisible by 13.
What are the factors of 55523?
1, 13, 4271, 55523.
What is 55523 in binary?
1101100011100011 (hexadecimal D8E3, octal 154343).
What is the square root of 55523?
About 235.6332.
Is 55523 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 55523?
55523 is a semiprime: 13 × 4271, the product of two primes.