Is 520 a prime number? What are the divisors of 520?

## Parity of 520

520 is an even number, because it is evenly divisible by 2: 520 / 2 = 260.

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## Is 520 a perfect square number?

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 520 is about 22.804.

Thus, the square root of 520 is not an integer, and therefore 520 is not a square number.

## What is the square number of 520?

The square of a number (here 520) is the result of the product of this number (520) by itself (i.e., 520 × 520); the square of 520 is sometimes called "raising 520 to the power 2", or "520 squared".

The square of 520 is 270 400 because 520 × 520 = 5202 = 270 400.

As a consequence, 520 is the square root of 270 400.

## Number of digits of 520

520 is a number with 3 digits.

## What are the multiples of 520?

The multiples of 520 are all integers evenly divisible by 520, that is all numbers such that the remainder of the division by 520 is zero. There are infinitely many multiples of 520. The smallest multiples of 520 are:

## How to determine whether an integer is a prime number?

To determine the primality of a number, several algorithms can be used. The most naive technique is to test all divisors strictly smaller to the number of which we want to determine the primality (here 520). First, we can eliminate all even numbers greater than 2 (and hence 4, 6, 8…). Then, we can stop this check when we reach the square root of the number of which we want to determine the primality (here the square root is about 22.804). Historically, the sieve of Eratosthenes (dating from the Greek mathematics) implements this technique in a relatively efficient manner.

More modern techniques include the sieve of Atkin, probabilistic algorithms, and the cyclotomic AKS test.

## Numbers near 520

• Preceding numbers: …518, 519
• Following numbers: 521, 522

### Nearest numbers from 520

• Preceding prime number: 509
• Following prime number: 521
Find out whether some integer is a prime number