The number 55290
55290 is a composite number with 32 divisors. Its prime factorisation is 2 × 3 × 5 × 19 × 97. Divisors (32): 1, 2, 3, 5, 6, 10, 15, 19, 30, 38, 57, 95, 97, 114, 190, 194 … 55290.
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How to work it out
- 1
55290 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55290 is composite. Its prime factorisation is
- 3
The divisors add up to 141120; without 55290 itself that is 85830, so 55290 is abundant (85830 is more than 55290). Euler's totient φ(55290) = 13824 numbers up to 55290 share no factor with it.
- 4
The digits of 55290 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55290 = 2 \times 3 \times 5 \times 19 \times 97 \]
55290 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 32 |
| Sum of divisors | 141120 |
| Euler totient φ(n) | 13824 |
| Square | 3056984100 |
| Cube | 169020650889000 |
| Square root | 235.138257 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.529 × |
55290 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand two hundred and ninety |
| Binary (base 2) | 1101011111111010 |
| Octal (base 8) | 153772 |
| Hexadecimal (base 16) | D7FA |
| Base 3 | 2210211210 |
| As time | 55290 seconds = 15 h 21 min 30 s |
Is 55290 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55290 ÷ 2 = 27645) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (55290 ÷ 3 = 18430) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (55290 ÷ 5 = 11058) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (55290 ÷ 6 = 9215) | 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 2) | 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 | Yes (55290 ÷ 10 = 5529) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55290 a prime number?
No. 55290 = 2 × 3 × 5 × 19 × 97, so it is divisible by 2.
What are the factors of 55290?
1, 2, 3, 5, 6, 10, 15, 19, 30, 38, 57, 95, 97, 114, 190, 194, 285, 291, 485, 570, 582, 970, 1455, 1843, 2910, 3686, 5529, 9215, 11058, 18430, 27645, 55290.
What is 55290 in binary?
1101011111111010 (hexadecimal D7FA, octal 153772).
What is the square root of 55290?
About 235.1383.
Is 55290 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 55290?
It is a composite number with 32 divisors.