The number 55563
55563 is a composite number with 4 divisors. Its prime factorisation is 3 × 18521. Divisors (4): 1, 3, 18521, 55563.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55563: a semiprime: 3 × 18521, the product of two primes.
- 2
55563 is composite. Its prime factorisation is
- 3
The divisors add up to 74088; without 55563 itself that is 18525, so 55563 is deficient (18525 is less than 55563). Euler's totient φ(55563) = 37040 numbers up to 55563 share no factor with it.
- 4
The digits of 55563 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 140 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55563 = 3 \times 18521 \]
55563 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 74088 |
| Euler totient φ(n) | 37040 |
| Square | 3087246969 |
| Cube | 171536703338547 |
| Square root | 235.718052 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 140 |
| Scientific notation | 5.5563 × |
55563 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand five hundred and sixty-three |
| Binary (base 2) | 1101100100001011 |
| Octal (base 8) | 154413 |
| Hexadecimal (base 16) | D90B |
| Base 3 | 2211012220 |
| As time | 55563 seconds = 15 h 26 min 3 s |
Is 55563 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 (55563 ÷ 3 = 18521) | 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 4) | 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 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 2) | 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 55563 a prime number?
No. 55563 = 3 × 18521, so it is divisible by 3.
What are the factors of 55563?
1, 3, 18521, 55563.
What is 55563 in binary?
1101100100001011 (hexadecimal D90B, octal 154413).
What is the square root of 55563?
About 235.7181.
Is 55563 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 55563?
55563 is a semiprime: 3 × 18521, the product of two primes.