The number 55749
55749 is a composite number with 4 divisors. Its prime factorisation is 3 × 18583. Divisors (4): 1, 3, 18583, 55749.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55749: a semiprime: 3 × 18583, the product of two primes.
- 2
55749 is composite. Its prime factorisation is
- 3
The divisors add up to 74336; without 55749 itself that is 18587, so 55749 is deficient (18587 is less than 55749). Euler's totient φ(55749) = 37164 numbers up to 55749 share no factor with it.
- 4
The digits of 55749 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 34 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55749 = 3 \times 18583 \]
55749 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 74336 |
| Euler totient φ(n) | 37164 |
| Square | 3107951001 |
| Cube | 173265160354749 |
| Square root | 236.112261 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 34 |
| Scientific notation | 5.5749 × |
55749 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand seven hundred and forty-nine |
| Binary (base 2) | 1101100111000101 |
| Octal (base 8) | 154705 |
| Hexadecimal (base 16) | D9C5 |
| Base 3 | 2211110210 |
| As time | 55749 seconds = 15 h 29 min 9 s |
Is 55749 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 (55749 ÷ 3 = 18583) | 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 4) | 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 1) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55749 a prime number?
No. 55749 = 3 × 18583, so it is divisible by 3.
What are the factors of 55749?
1, 3, 18583, 55749.
What is 55749 in binary?
1101100111000101 (hexadecimal D9C5, octal 154705).
What is the square root of 55749?
About 236.1123.
Is 55749 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 55749?
55749 is a semiprime: 3 × 18583, the product of two primes.