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In addition we can say of the number **230 that it is even**

230 is an even number, as it is divisible by 2 : 230/2 = 115

The factors for 230 are all the numbers between -230 and 230 , which divide 230 without leaving any remainder. Since 230 divided by -230 is an integer, -230 is a factor of 230 .

Since 230 divided by -230 is a whole number, -230 is a factor of 230

Since 230 divided by -115 is a whole number, -115 is a factor of 230

Since 230 divided by -46 is a whole number, -46 is a factor of 230

Since 230 divided by -23 is a whole number, -23 is a factor of 230

Since 230 divided by -10 is a whole number, -10 is a factor of 230

Since 230 divided by -5 is a whole number, -5 is a factor of 230

Since 230 divided by -2 is a whole number, -2 is a factor of 230

Since 230 divided by -1 is a whole number, -1 is a factor of 230

Since 230 divided by 1 is a whole number, 1 is a factor of 230

Since 230 divided by 2 is a whole number, 2 is a factor of 230

Since 230 divided by 5 is a whole number, 5 is a factor of 230

Since 230 divided by 10 is a whole number, 10 is a factor of 230

Since 230 divided by 23 is a whole number, 23 is a factor of 230

Since 230 divided by 46 is a whole number, 46 is a factor of 230

Since 230 divided by 115 is a whole number, 115 is a factor of 230

Multiples of 230 are all integers divisible by 230 , i.e. the remainder of the full division by 230 is zero. There are infinite multiples of 230. The smallest multiples of 230 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 230 since 0 × 230 = 0

230 : in fact, 230 is a multiple of itself, since 230 is divisible by 230 (it was 230 / 230 = 1, so the rest of this division is zero)

etc.

It is possible to determine using mathematical techniques whether an integer is prime or not.

for 230, the answer is:
**No, 230 is not a prime number**.

To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 230). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 15.166 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.

More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.

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