The number 25525
25525 is a composite number with 6 divisors. Its prime factorisation is Ć 1021. Divisors (6): 1, 5, 25, 1021, 5105, 25525.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
25525 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
25525 is composite. Its prime factorisation is
- 3
The divisors add up to 31682; without 25525 itself that is 6157, so 25525 is deficient (6157 is less than 25525). Euler's totient Ļ(25525) = 20400 numbers up to 25525 share no factor with it.
- 4
The digits of 25525 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 77 steps to reach 1.
LaTeX source of the formulas on this page
\[ 25525 = 5^{2} \times 1021 \]25525 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 31682 |
| Euler totient Ļ(n) | 20400 |
| Square | 651525625 |
| Cube | 16630191578125 |
| Square root | 159.765453 (= 5ā1021) |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 77 |
| Scientific notation | 2.5525 Ć |
25525 in other forms
| Form | Value |
|---|---|
| In words | twenty-five thousand five hundred and twenty-five |
| Binary (base 2) | 110001110110101 |
| Octal (base 8) | 61665 |
| Hexadecimal (base 16) | 63B5 |
| Base 3 | 1022000101 |
| As time | 25525 seconds = 7 h 5 min 25 s |
Is 25525 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (25525 Ć· 5 = 5105) | 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 3) | 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 1) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 25525 a prime number?
No. 25525 = Ć 1021, so it is divisible by 5.
What are the factors of 25525?
1, 5, 25, 1021, 5105, 25525.
What is 25525 in binary?
110001110110101 (hexadecimal 63B5, octal 61665).
What is the square root of 25525?
About 159.7655, exactly 5ā1021.
Is 25525 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 25525?
It is a composite number with 6 divisors.