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Is 521 a Prime Number?

Is 521 a prime number? Numbers having only 2 factors, i.e. 1 and the number itself are known as prime numbers whereas numbers with more than 2 factors are known as composite. The answer to the question whether 521 is a prime or composite is - "521 is a prime number." Now, let us find out how and why is 521 a prime number or a composite number?

Is 521 a prime number? - Yes
Is 521 a composite number? - No
Factors of 521 - 1, 521
Is 521 a perfect square? - No
Prime Factors of 521 - 521

Yes, 521 is a prime number. The number 521 is divisible only by 1 and the number itself. For a number to be classified as a prime number, it should have exactly two factors. Since 521 has exactly two factors, i.e. 1 and 521, it is a prime number.

Is 521 a Prime or Composite?

How is 521 a Prime Number?

To understand whether 521 is composite or prime, it is important to find its factors.

Factors of 521: 1, 521

Therefore, we can say that 521 is a prime number since it has only 2 factors.

☛ Prime Number Calculator

Is 521 a Composite Number?

No, since 521 has only two factors, i.e. 1 and 521. In other words, 521 is not a composite number because 521 doesn’t have more than 2 factors.

Problem Statements:

Is 521 a Prime Number?	Yes
Is 521 a Composite Number?	No
Is 521 an Odd Number?	Yes
Is 521 an Even Number?	No
Is 521 a Perfect Cube?	No
Is 521 a Perfect Square?	No
Cube Root of 521	8.046586
Square Root of 521	22.825424
Multiples of 521	521, 1042, 1563, 2084, 2605, 3126, 3647, 4168, 4689, 5210

Fun Facts:

All prime numbers don't have the last digit as 5 except the number 5.
Euler discovered a polynomial n² + n + 41 that produces prime numbers for values of n that lie between 0 and 39 inclusive. It can generate 40 prime numbers for 0 <= n <= 39.
23 is the smallest prime number having consecutive digits.

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