The number 55479
55479 is a composite number with 4 divisors. Its prime factorisation is 3 × 18493. Divisors (4): 1, 3, 18493, 55479.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55479: a semiprime: 3 × 18493, the product of two primes.
- 2
55479 is composite. Its prime factorisation is
- 3
The divisors add up to 73976; without 55479 itself that is 18497, so 55479 is deficient (18497 is less than 55479). Euler's totient φ(55479) = 36984 numbers up to 55479 share no factor with it.
- 4
The digits of 55479 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 184 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55479 = 3 \times 18493 \]
55479 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 73976 |
| Euler totient φ(n) | 36984 |
| Square | 3077919441 |
| Cube | 170759892667239 |
| Square root | 235.539806 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 184 |
| Scientific notation | 5.5479 × |
55479 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand four hundred and seventy-nine |
| Binary (base 2) | 1101100010110111 |
| Octal (base 8) | 154267 |
| Hexadecimal (base 16) | D8B7 |
| Base 3 | 2211002210 |
| As time | 55479 seconds = 15 h 24 min 39 s |
Is 55479 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 | Yes (55479 ÷ 3 = 18493) | 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 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55479 a prime number?
No. 55479 = 3 × 18493, so it is divisible by 3.
What are the factors of 55479?
1, 3, 18493, 55479.
What is 55479 in binary?
1101100010110111 (hexadecimal D8B7, octal 154267).
What is the square root of 55479?
About 235.5398.
Is 55479 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 55479?
55479 is a semiprime: 3 × 18493, the product of two primes.