The number 80501
80501 is a composite number with 4 divisors. Its prime factorisation is 79 × 1019. Divisors (4): 1, 79, 1019, 80501.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80501: a semiprime: 79 × 1019, the product of two primes.
- 2
80501 is composite. Its prime factorisation is
- 3
The divisors add up to 81600; without 80501 itself that is 1099, so 80501 is deficient (1099 is less than 80501). Euler's totient φ(80501) = 79404 numbers up to 80501 share no factor with it.
- 4
The digits of 80501 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 120 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80501 = 79 \times 1019 \]
80501 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 81600 |
| Euler totient φ(n) | 79404 |
| Square | 6480411001 |
| Cube | 521679565991501 |
| Square root | 283.726981 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 120 |
| Scientific notation | 8.0501 × |
80501 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand five hundred and one |
| Binary (base 2) | 10011101001110101 |
| Octal (base 8) | 235165 |
| Hexadecimal (base 16) | 13A75 |
| Base 3 | 11002102112 |
| As time | 80501 seconds = 22 h 21 min 41 s |
Is 80501 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 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 5) | 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 5) | 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 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80501 a prime number?
No. 80501 = 79 × 1019, so it is divisible by 79.
What are the factors of 80501?
1, 79, 1019, 80501.
What is 80501 in binary?
10011101001110101 (hexadecimal 13A75, octal 235165).
What is the square root of 80501?
About 283.7270.
Is 80501 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 80501?
80501 is a semiprime: 79 × 1019, the product of two primes.