The number 55211
55211 is a composite number with 8 divisors. Its prime factorisation is 13 × 31 × 137. Divisors (8): 1, 13, 31, 137, 403, 1781, 4247, 55211.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55211 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55211 is composite. Its prime factorisation is
- 3
The divisors add up to 61824; without 55211 itself that is 6613, so 55211 is deficient (6613 is less than 55211). Euler's totient φ(55211) = 48960 numbers up to 55211 share no factor with it.
- 4
The digits of 55211 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 122 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55211 = 13 \times 31 \times 137 \]
55211 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 61824 |
| Euler totient φ(n) | 48960 |
| Square | 3048254521 |
| Cube | 168297180358931 |
| Square root | 234.970211 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 122 |
| Scientific notation | 5.5211 × |
55211 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand two hundred and eleven |
| Binary (base 2) | 1101011110101011 |
| Octal (base 8) | 153653 |
| Hexadecimal (base 16) | D7AB |
| Base 3 | 2210201212 |
| As time | 55211 seconds = 15 h 20 min 11 s |
Is 55211 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 2) | 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 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55211 a prime number?
No. 55211 = 13 × 31 × 137, so it is divisible by 13.
What are the factors of 55211?
1, 13, 31, 137, 403, 1781, 4247, 55211.
What is 55211 in binary?
1101011110101011 (hexadecimal D7AB, octal 153653).
What is the square root of 55211?
About 234.9702.
Is 55211 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 55211?
It is a composite number with 8 divisors.