The number 61031
61031 is the 6149th prime number. Its only divisors are 1 and 61031.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 61031: the 6149th prime number.
- 2
61031 is prime, so its only factors are 1 and 61031. It is the 6149th prime; the next prime is 61043 and the one before is 61027.
- 3
The divisors add up to 61032; without 61031 itself that is 1, so 61031 is deficient (1 is less than 61031). Euler's totient φ(61031) = 61030 numbers up to 61031 share no factor with it.
- 4
The digits of 61031 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 179 steps to reach 1.
61031 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 61032 |
| Euler totient φ(n) | 61030 |
| Square | 3724782961 |
| Cube | 227327228892791 |
| Square root | 247.044530 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 179 |
| Scientific notation | 6.1031 × |
61031 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand and thirty-one |
| Binary (base 2) | 1110111001100111 |
| Octal (base 8) | 167147 |
| Hexadecimal (base 16) | EE67 |
| Base 3 | 10002201102 |
| As time | 61031 seconds = 16 h 57 min 11 s |
Is 61031 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 5) | 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 2) | 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 3) | 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 61031 a prime number?
Yes. 61031 is divisible only by 1 and itself.
What are the factors of 61031?
1, 61031.
What is 61031 in binary?
1110111001100111 (hexadecimal EE67, octal 167147).
What is the square root of 61031?
About 247.0445.
Is 61031 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 61031?
61031 is the 6149th prime number.