The number 24221
24221 is a composite number with 4 divisors. Its prime factorisation is 53 × 457. Divisors (4): 1, 53, 457, 24221.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 24221: a semiprime: 53 × 457, the product of two primes.
- 2
24221 is composite. Its prime factorisation is
- 3
The divisors add up to 24732; without 24221 itself that is 511, so 24221 is deficient (511 is less than 24221). Euler's totient φ(24221) = 23712 numbers up to 24221 share no factor with it.
- 4
The digits of 24221 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 95 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24221 = 53 \times 457 \]
24221 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 24732 |
| Euler totient φ(n) | 23712 |
| Square | 586656841 |
| Cube | 14209415345861 |
| Square root | 155.630974 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 95 |
| Scientific notation | 2.4221 × |
24221 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand two hundred and twenty-one |
| Binary (base 2) | 101111010011101 |
| Octal (base 8) | 57235 |
| Hexadecimal (base 16) | 5E9D |
| Base 3 | 1020020002 |
| As time | 24221 seconds = 6 h 43 min 41 s |
Is 24221 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 1) | 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 | No (remainder 1) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24221 a prime number?
No. 24221 = 53 × 457, so it is divisible by 53.
What are the factors of 24221?
1, 53, 457, 24221.
What is 24221 in binary?
101111010011101 (hexadecimal 5E9D, octal 57235).
What is the square root of 24221?
About 155.6310.
Is 24221 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 24221?
24221 is a semiprime: 53 × 457, the product of two primes.