The number 47755
47755 is a composite number with 4 divisors. Its prime factorisation is 5 × 9551. Divisors (4): 1, 5, 9551, 47755.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47755: a semiprime: 5 × 9551, the product of two primes.
- 2
47755 is composite. Its prime factorisation is
- 3
The divisors add up to 57312; without 47755 itself that is 9557, so 47755 is deficient (9557 is less than 47755). Euler's totient φ(47755) = 38200 numbers up to 47755 share no factor with it.
- 4
The digits of 47755 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 145 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47755 = 5 \times 9551 \]
47755 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57312 |
| Euler totient φ(n) | 38200 |
| Square | 2280540025 |
| Cube | 108907188893875 |
| Square root | 218.529174 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 145 |
| Scientific notation | 4.7755 × |
47755 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand seven hundred and fifty-five |
| Binary (base 2) | 1011101010001011 |
| Octal (base 8) | 135213 |
| Hexadecimal (base 16) | BA8B |
| Base 3 | 2102111201 |
| As time | 47755 seconds = 13 h 15 min 55 s |
Is 47755 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (47755 ÷ 5 = 9551) | 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 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 3) | 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 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47755 a prime number?
No. 47755 = 5 × 9551, so it is divisible by 5.
What are the factors of 47755?
1, 5, 9551, 47755.
What is 47755 in binary?
1011101010001011 (hexadecimal BA8B, octal 135213).
What is the square root of 47755?
About 218.5292.
Is 47755 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 47755?
47755 is a semiprime: 5 × 9551, the product of two primes.