The number 55669
55669 is a composite number with 4 divisors. Its prime factorisation is 179 × 311. Divisors (4): 1, 179, 311, 55669.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55669: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 179 × 311, the product of two primes.
- 2
55669 is composite. Its prime factorisation is
- 3
The divisors add up to 56160; without 55669 itself that is 491, so 55669 is deficient (491 is less than 55669). Euler's totient φ(55669) = 55180 numbers up to 55669 share no factor with it.
- 4
The digits of 55669 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55669 = 179 \times 311 \]
55669 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56160 |
| Euler totient φ(n) | 55180 |
| Square | 3099037561 |
| Cube | 172520321983309 |
| Square root | 235.942790 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 60 |
| Scientific notation | 5.5669 × |
55669 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand six hundred and sixty-nine |
| Binary (base 2) | 1101100101110101 |
| Octal (base 8) | 154565 |
| Hexadecimal (base 16) | D975 |
| Base 3 | 2211100211 |
| As time | 55669 seconds = 15 h 27 min 49 s |
Is 55669 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 | No (remainder 4) | 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 5) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | 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 55669 a prime number?
No. 55669 = 179 × 311, so it is divisible by 179.
What are the factors of 55669?
1, 179, 311, 55669.
What is 55669 in binary?
1101100101110101 (hexadecimal D975, octal 154565).
What is the square root of 55669?
About 235.9428.
Is 55669 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 55669?
55669 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 179 × 311, the product of two primes.