The number 50491
50491 is a composite number with 4 divisors. Its prime factorisation is 7 × 7213. Divisors (4): 1, 7, 7213, 50491.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 50491: a semiprime: 7 × 7213, the product of two primes.
- 2
50491 is composite. Its prime factorisation is
- 3
The divisors add up to 57712; without 50491 itself that is 7221, so 50491 is deficient (7221 is less than 50491). Euler's totient φ(50491) = 43272 numbers up to 50491 share no factor with it.
- 4
The digits of 50491 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 65 steps to reach 1.
LaTeX source of the formulas on this page
\[ 50491 = 7 \times 7213 \]
50491 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57712 |
| Euler totient φ(n) | 43272 |
| Square | 2549341081 |
| Cube | 128718780520771 |
| Square root | 224.702025 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 65 |
| Scientific notation | 5.0491 × |
50491 in other forms
| Form | Value |
|---|---|
| In words | fifty thousand four hundred and ninety-one |
| Binary (base 2) | 1100010100111011 |
| Octal (base 8) | 142473 |
| Hexadecimal (base 16) | C53B |
| Base 3 | 2120021001 |
| As time | 50491 seconds = 14 h 1 min 31 s |
Is 50491 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 | Yes (50491 ÷ 7 = 7213) | 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 1) | 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 50491 a prime number?
No. 50491 = 7 × 7213, so it is divisible by 7.
What are the factors of 50491?
1, 7, 7213, 50491.
What is 50491 in binary?
1100010100111011 (hexadecimal C53B, octal 142473).
What is the square root of 50491?
About 224.7020.
Is 50491 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 50491?
50491 is a semiprime: 7 × 7213, the product of two primes.