The number 55489
55489 is a composite number with 4 divisors. Its prime factorisation is 7 × 7927. Divisors (4): 1, 7, 7927, 55489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55489: a semiprime: 7 × 7927, the product of two primes.
- 2
55489 is composite. Its prime factorisation is
- 3
The divisors add up to 63424; without 55489 itself that is 7935, so 55489 is deficient (7935 is less than 55489). Euler's totient φ(55489) = 47556 numbers up to 55489 share no factor with it.
- 4
The digits of 55489 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 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55489 = 7 \times 7927 \]
55489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63424 |
| Euler totient φ(n) | 47556 |
| Square | 3079029121 |
| Cube | 170852246895169 |
| Square root | 235.561032 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.5489 × |
55489 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand four hundred and eighty-nine |
| Binary (base 2) | 1101100011000001 |
| Octal (base 8) | 154301 |
| Hexadecimal (base 16) | D8C1 |
| Base 3 | 2211010011 |
| As time | 55489 seconds = 15 h 24 min 49 s |
Is 55489 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 | Yes (55489 ÷ 7 = 7927) | 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 1) | 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 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 55489 a prime number?
No. 55489 = 7 × 7927, so it is divisible by 7.
What are the factors of 55489?
1, 7, 7927, 55489.
What is 55489 in binary?
1101100011000001 (hexadecimal D8C1, octal 154301).
What is the square root of 55489?
About 235.5610.
Is 55489 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 55489?
55489 is a semiprime: 7 × 7927, the product of two primes.