Is 355 a prime number? What are the divisors of 355?

## Parity of 355

355 is an odd number, because it is not evenly divisible by 2.

Find out more:

## Is 355 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 355 is about 18.841.

Thus, the square root of 355 is not an integer, and therefore 355 is not a square number.

## What is the square number of 355?

The square of a number (here 355) is the result of the product of this number (355) by itself (i.e., 355 × 355); the square of 355 is sometimes called "raising 355 to the power 2", or "355 squared".

The square of 355 is 126 025 because 355 × 355 = 3552 = 126 025.

As a consequence, 355 is the square root of 126 025.

## Number of digits of 355

355 is a number with 3 digits.

## What are the multiples of 355?

The multiples of 355 are all integers evenly divisible by 355, that is all numbers such that the remainder of the division by 355 is zero. There are infinitely many multiples of 355. The smallest multiples of 355 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 355). 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 18.841). 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 355

• Preceding numbers: …353, 354
• Following numbers: 356, 357

### Nearest numbers from 355

• Preceding prime number: 353
• Following prime number: 359
Find out whether some integer is a prime number