The number 24955
24955 is a composite number with 16 divisors. Its prime factorisation is 5 × 7 × 23 × 31. Divisors (16): 1, 5, 7, 23, 31, 35, 115, 155, 161, 217, 713, 805, 1085, 3565, 4991, 24955.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
24955 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
24955 is composite. Its prime factorisation is
- 3
The divisors add up to 36864; without 24955 itself that is 11909, so 24955 is deficient (11909 is less than 24955). Euler's totient φ(24955) = 15840 numbers up to 24955 share no factor with it.
- 4
The digits of 24955 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 95 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24955 = 5 \times 7 \times 23 \times 31 \]
24955 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 36864 |
| Euler totient φ(n) | 15840 |
| Square | 622752025 |
| Cube | 15540776783875 |
| Square root | 157.971516 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 95 |
| Scientific notation | 2.4955 × |
24955 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand nine hundred and fifty-five |
| Binary (base 2) | 110000101111011 |
| Octal (base 8) | 60573 |
| Hexadecimal (base 16) | 617B |
| Base 3 | 1021020021 |
| As time | 24955 seconds = 6 h 55 min 55 s |
Is 24955 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 | Yes (24955 ÷ 5 = 4991) | 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 (24955 ÷ 7 = 3565) | 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24955 a prime number?
No. 24955 = 5 × 7 × 23 × 31, so it is divisible by 5.
What are the factors of 24955?
1, 5, 7, 23, 31, 35, 115, 155, 161, 217, 713, 805, 1085, 3565, 4991, 24955.
What is 24955 in binary?
110000101111011 (hexadecimal 617B, octal 60573).
What is the square root of 24955?
About 157.9715.
Is 24955 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 24955?
It is a composite number with 16 divisors.