The number 16331
16331 is a composite number with 4 divisors. Its prime factorisation is 7 × 2333. Divisors (4): 1, 7, 2333, 16331.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 16331: a semiprime: 7 × 2333, the product of two primes.
- 2
16331 is composite. Its prime factorisation is
- 3
The divisors add up to 18672; without 16331 itself that is 2341, so 16331 is deficient (2341 is less than 16331). Euler's totient φ(16331) = 13992 numbers up to 16331 share no factor with it.
- 4
The digits of 16331 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 115 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16331 = 7 \times 2333 \]
16331 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 18672 |
| Euler totient φ(n) | 13992 |
| Square | 266701561 |
| Cube | 4355503192691 |
| Square root | 127.792801 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 115 |
| Scientific notation | 1.6331 × |
16331 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand three hundred and thirty-one |
| Binary (base 2) | 11111111001011 |
| Octal (base 8) | 37713 |
| Hexadecimal (base 16) | 3FCB |
| Base 3 | 211101212 |
| As time | 16331 seconds = 4 h 32 min 11 s |
Is 16331 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 1) | 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 | Yes (16331 ÷ 7 = 2333) | 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 5) | 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 7) | 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 16331 a prime number?
No. 16331 = 7 × 2333, so it is divisible by 7.
What are the factors of 16331?
1, 7, 2333, 16331.
What is 16331 in binary?
11111111001011 (hexadecimal 3FCB, octal 37713).
What is the square root of 16331?
About 127.7928.
Is 16331 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 16331?
16331 is a semiprime: 7 × 2333, the product of two primes.