The number 55138
55138 is a composite number with 8 divisors. Its prime factorisation is 2 × 19 × 1451. Divisors (8): 1, 2, 19, 38, 1451, 2902, 27569, 55138.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55138 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55138 is composite. Its prime factorisation is
- 3
The divisors add up to 87120; without 55138 itself that is 31982, so 55138 is deficient (31982 is less than 55138). Euler's totient φ(55138) = 26100 numbers up to 55138 share no factor with it.
- 4
The digits of 55138 add up to 22, 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
\[ 55138 = 2 \times 19 \times 1451 \]
55138 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 87120 |
| Euler totient φ(n) | 26100 |
| Square | 3040199044 |
| Cube | 167630494888072 |
| Square root | 234.814821 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 60 |
| Scientific notation | 5.5138 × |
55138 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand one hundred and thirty-eight |
| Binary (base 2) | 1101011101100010 |
| Octal (base 8) | 153542 |
| Hexadecimal (base 16) | D762 |
| Base 3 | 2210122011 |
| As time | 55138 seconds = 15 h 18 min 58 s |
Is 55138 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55138 ÷ 2 = 27569) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55138 a prime number?
No. 55138 = 2 × 19 × 1451, so it is divisible by 2.
What are the factors of 55138?
1, 2, 19, 38, 1451, 2902, 27569, 55138.
What is 55138 in binary?
1101011101100010 (hexadecimal D762, octal 153542).
What is the square root of 55138?
About 234.8148.
Is 55138 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 55138?
It is a composite number with 8 divisors.