The number 31411
31411 is a composite number with 4 divisors. Its prime factorisation is 101 × 311. Divisors (4): 1, 101, 311, 31411.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31411: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 101 × 311, the product of two primes.
- 2
31411 is composite. Its prime factorisation is
- 3
The divisors add up to 31824; without 31411 itself that is 413, so 31411 is deficient (413 is less than 31411). Euler's totient φ(31411) = 31000 numbers up to 31411 share no factor with it.
- 4
The digits of 31411 add up to 10, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 103 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31411 = 101 \times 311 \]
31411 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31824 |
| Euler totient φ(n) | 31000 |
| Square | 986650921 |
| Cube | 30991692079531 |
| Square root | 177.231487 |
| Digit sum / digital root | 10 / 1 |
| Collatz steps to 1 | 103 |
| Scientific notation | 3.1411 × |
31411 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and eleven |
| Binary (base 2) | 111101010110011 |
| Octal (base 8) | 75263 |
| Hexadecimal (base 16) | 7AB3 |
| Base 3 | 1121002101 |
| As time | 31411 seconds = 8 h 43 min 31 s |
Is 31411 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 | No (remainder 1) | 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 2) | 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 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31411 a prime number?
No. 31411 = 101 × 311, so it is divisible by 101.
What are the factors of 31411?
1, 101, 311, 31411.
What is 31411 in binary?
111101010110011 (hexadecimal 7AB3, octal 75263).
What is the square root of 31411?
About 177.2315.
Is 31411 divisible by 3?
No. Its digits add up to 10, which is not a multiple of 3.
What is special about the number 31411?
31411 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 101 × 311, the product of two primes.