The number 47031
47031 is a composite number with 8 divisors. Its prime factorisation is 3 × 61 × 257. Divisors (8): 1, 3, 61, 183, 257, 771, 15677, 47031.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47031 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47031 is composite. Its prime factorisation is
- 3
The divisors add up to 63984; without 47031 itself that is 16953, so 47031 is deficient (16953 is less than 47031). Euler's totient φ(47031) = 30720 numbers up to 47031 share no factor with it.
- 4
The digits of 47031 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47031 = 3 \times 61 \times 257 \]
47031 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 63984 |
| Euler totient φ(n) | 30720 |
| Square | 2211914961 |
| Cube | 104028572530791 |
| Square root | 216.866318 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.7031 × |
47031 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand and thirty-one |
| Binary (base 2) | 1011011110110111 |
| Octal (base 8) | 133667 |
| Hexadecimal (base 16) | B7B7 |
| Base 3 | 2101111220 |
| As time | 47031 seconds = 13 h 3 min 51 s |
Is 47031 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 (47031 ÷ 3 = 15677) | 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 1) | 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 5) | 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 7) | 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 1) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47031 a prime number?
No. 47031 = 3 × 61 × 257, so it is divisible by 3.
What are the factors of 47031?
1, 3, 61, 183, 257, 771, 15677, 47031.
What is 47031 in binary?
1011011110110111 (hexadecimal B7B7, octal 133667).
What is the square root of 47031?
About 216.8663.
Is 47031 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 47031?
It is a composite number with 8 divisors.