The number 46981
46981 is a composite number with 4 divisors. Its prime factorisation is 11 × 4271. Divisors (4): 1, 11, 4271, 46981.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 46981: a semiprime: 11 × 4271, the product of two primes.
- 2
46981 is composite. Its prime factorisation is
- 3
The divisors add up to 51264; without 46981 itself that is 4283, so 46981 is deficient (4283 is less than 46981). Euler's totient φ(46981) = 42700 numbers up to 46981 share no factor with it.
- 4
The digits of 46981 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 83 steps to reach 1.
LaTeX source of the formulas on this page
\[ 46981 = 11 \times 4271 \]
46981 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 51264 |
| Euler totient φ(n) | 42700 |
| Square | 2207214361 |
| Cube | 103697137894141 |
| Square root | 216.751009 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 83 |
| Scientific notation | 4.6981 × |
46981 in other forms
| Form | Value |
|---|---|
| In words | forty-six thousand nine hundred and eighty-one |
| Binary (base 2) | 1011011110000101 |
| Octal (base 8) | 133605 |
| Hexadecimal (base 16) | B785 |
| Base 3 | 2101110001 |
| As time | 46981 seconds = 13 h 3 min 1 s |
Is 46981 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 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | 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 1) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 | Yes (46981 ÷ 11 = 4271) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 46981 a prime number?
No. 46981 = 11 × 4271, so it is divisible by 11.
What are the factors of 46981?
1, 11, 4271, 46981.
What is 46981 in binary?
1011011110000101 (hexadecimal B785, octal 133605).
What is the square root of 46981?
About 216.7510.
Is 46981 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 46981?
46981 is a semiprime: 11 × 4271, the product of two primes.