The number 55513
55513 is a composite number with 4 divisors. Its prime factorisation is 43 × 1291. Divisors (4): 1, 43, 1291, 55513.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55513: a semiprime: 43 × 1291, the product of two primes.
- 2
55513 is composite. Its prime factorisation is
- 3
The divisors add up to 56848; without 55513 itself that is 1335, so 55513 is deficient (1335 is less than 55513). Euler's totient φ(55513) = 54180 numbers up to 55513 share no factor with it.
- 4
The digits of 55513 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 184 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55513 = 43 \times 1291 \]
55513 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56848 |
| Euler totient φ(n) | 54180 |
| Square | 3081693169 |
| Cube | 171074032890697 |
| Square root | 235.611969 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 184 |
| Scientific notation | 5.5513 × |
55513 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand five hundred and thirteen |
| Binary (base 2) | 1101100011011001 |
| Octal (base 8) | 154331 |
| Hexadecimal (base 16) | D8D9 |
| Base 3 | 2211011001 |
| As time | 55513 seconds = 15 h 25 min 13 s |
Is 55513 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 1) | 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 1) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55513 a prime number?
No. 55513 = 43 × 1291, so it is divisible by 43.
What are the factors of 55513?
1, 43, 1291, 55513.
What is 55513 in binary?
1101100011011001 (hexadecimal D8D9, octal 154331).
What is the square root of 55513?
About 235.6120.
Is 55513 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 55513?
55513 is a semiprime: 43 × 1291, the product of two primes.