The number 31463
31463 is a composite number with 4 divisors. Its prime factorisation is 73 × 431. Divisors (4): 1, 73, 431, 31463.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31463: a semiprime: 73 × 431, the product of two primes.
- 2
31463 is composite. Its prime factorisation is
- 3
The divisors add up to 31968; without 31463 itself that is 505, so 31463 is deficient (505 is less than 31463). Euler's totient φ(31463) = 30960 numbers up to 31463 share no factor with it.
- 4
The digits of 31463 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 90 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31463 = 73 \times 431 \]
31463 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31968 |
| Euler totient φ(n) | 30960 |
| Square | 989920369 |
| Cube | 31145864569847 |
| Square root | 177.378127 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 90 |
| Scientific notation | 3.1463 × |
31463 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and sixty-three |
| Binary (base 2) | 111101011100111 |
| Octal (base 8) | 75347 |
| Hexadecimal (base 16) | 7AE7 |
| Base 3 | 1121011022 |
| As time | 31463 seconds = 8 h 44 min 23 s |
Is 31463 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 3) | 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 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 8) | 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 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31463 a prime number?
No. 31463 = 73 × 431, so it is divisible by 73.
What are the factors of 31463?
1, 73, 431, 31463.
What is 31463 in binary?
111101011100111 (hexadecimal 7AE7, octal 75347).
What is the square root of 31463?
About 177.3781.
Is 31463 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 31463?
31463 is a semiprime: 73 × 431, the product of two primes.