The number 56513
56513 is a composite number with 4 divisors. Its prime factorisation is 31 × 1823. Divisors (4): 1, 31, 1823, 56513.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 56513: a semiprime: 31 × 1823, the product of two primes.
- 2
56513 is composite. Its prime factorisation is
- 3
The divisors add up to 58368; without 56513 itself that is 1855, so 56513 is deficient (1855 is less than 56513). Euler's totient φ(56513) = 54660 numbers up to 56513 share no factor with it.
- 4
The digits of 56513 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 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 56513 = 31 \times 1823 \]
56513 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 58368 |
| Euler totient φ(n) | 54660 |
| Square | 3193719169 |
| Cube | 180486651397697 |
| Square root | 237.724631 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 60 |
| Scientific notation | 5.6513 × |
56513 in other forms
| Form | Value |
|---|---|
| In words | fifty-six thousand five hundred and thirteen |
| Binary (base 2) | 1101110011000001 |
| Octal (base 8) | 156301 |
| Hexadecimal (base 16) | DCC1 |
| Base 3 | 2212112002 |
| As time | 56513 seconds = 15 h 41 min 53 s |
Is 56513 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 1) | 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 2) | 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 1) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 56513 a prime number?
No. 56513 = 31 × 1823, so it is divisible by 31.
What are the factors of 56513?
1, 31, 1823, 56513.
What is 56513 in binary?
1101110011000001 (hexadecimal DCC1, octal 156301).
What is the square root of 56513?
About 237.7246.
Is 56513 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 56513?
56513 is a semiprime: 31 × 1823, the product of two primes.