The number 55023
55023 is a composite number with 4 divisors. Its prime factorisation is 3 × 18341. Divisors (4): 1, 3, 18341, 55023.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55023: a semiprime: 3 × 18341, the product of two primes.
- 2
55023 is composite. Its prime factorisation is
- 3
The divisors add up to 73368; without 55023 itself that is 18345, so 55023 is deficient (18345 is less than 55023). Euler's totient φ(55023) = 36680 numbers up to 55023 share no factor with it.
- 4
The digits of 55023 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 184 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55023 = 3 \times 18341 \]
55023 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 73368 |
| Euler totient φ(n) | 36680 |
| Square | 3027530529 |
| Cube | 166583812297167 |
| Square root | 234.569819 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 184 |
| Scientific notation | 5.5023 × |
55023 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand and twenty-three |
| Binary (base 2) | 1101011011101111 |
| Octal (base 8) | 153357 |
| Hexadecimal (base 16) | D6EF |
| Base 3 | 2210110220 |
| As time | 55023 seconds = 15 h 17 min 3 s |
Is 55023 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 | Yes (55023 ÷ 3 = 18341) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55023 a prime number?
No. 55023 = 3 × 18341, so it is divisible by 3.
What are the factors of 55023?
1, 3, 18341, 55023.
What is 55023 in binary?
1101011011101111 (hexadecimal D6EF, octal 153357).
What is the square root of 55023?
About 234.5698.
Is 55023 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 55023?
55023 is a semiprime: 3 × 18341, the product of two primes.