The number 55371
55371 is a composite number with 4 divisors. Its prime factorisation is 3 × 18457. Divisors (4): 1, 3, 18457, 55371.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 55371: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 3 × 18457, the product of two primes.
- 2
55371 is composite. Its prime factorisation is
- 3
The divisors add up to 73832; without 55371 itself that is 18461, so 55371 is deficient (18461 is less than 55371). Euler's totient φ(55371) = 36912 numbers up to 55371 share no factor with it.
- 4
The digits of 55371 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 109 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55371 = 3 \times 18457 \]
55371 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 73832 |
| Euler totient φ(n) | 36912 |
| Square | 3065947641 |
| Cube | 169764586829811 |
| Square root | 235.310433 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 109 |
| Scientific notation | 5.5371 × |
55371 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand three hundred and seventy-one |
| Binary (base 2) | 1101100001001011 |
| Octal (base 8) | 154113 |
| Hexadecimal (base 16) | D84B |
| Base 3 | 2210221210 |
| As time | 55371 seconds = 15 h 22 min 51 s |
Is 55371 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 (55371 ÷ 3 = 18457) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 3) | 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 8) | 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 55371 a prime number?
No. 55371 = 3 × 18457, so it is divisible by 3.
What are the factors of 55371?
1, 3, 18457, 55371.
What is 55371 in binary?
1101100001001011 (hexadecimal D84B, octal 154113).
What is the square root of 55371?
About 235.3104.
Is 55371 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 55371?
55371 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 3 × 18457, the product of two primes.