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Is 55 a Prime Number?

Is 55 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 55 is a prime or composite is - "55 is a composite number." Now, let us find out how and why is 55 a prime number or a composite number?

Is 55 a prime number? - No
Is 55 a composite number? - Yes
Factors of 55 - 1, 5, 11, 55
Prime Factors of 55 - 5, 11
Is 55 a perfect square? - No

Is 55 a Prime or Composite?

Is 55 a Prime Number?

No, 55 is not a prime number. The number 55 is divisible by 1, 5, 11, 55. For a number to be classified as a prime number, it should have exactly two factors. Since 55 has more than two factors, i.e. 1, 5, 11, 55, it is not a prime number.

Is 55 a Prime Number?

Why is 55 not a Prime Number?

To understand whether 55 is composite or prime, it is important to find its factors.

Factors of 55: 1, 5, 11, 55

Since 55 has more than 2 factors, we can say that 55 is not a prime number.

☛ Prime Number Calculator

Is 55 a Composite Number?

Yes, since 55 has more than two factors i.e. 1, 5, 11, 55. In other words, 55 is a composite number because 55 has more than 2 factors.

Problem Statements:

Is 55 a Prime Number?	No
Is 55 a Composite Number?	Yes
Is 55 a Perfect Square?	No
Square of 55	3025
Is 55 an Odd Number?	Yes
Multiples of 55	55, 110, 165, 220, 275, 330, 385, 440, 495, 550
Is 55 a Perfect Cube?	No
Cube Root of 55	3.802947
Square Root of 55	7.416198
Is 55 an Even Number?	No

Fun Facts:

A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 10601, 11311, 12421
A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 115 is semiprime, since 115 can be written as 5 × 23.
A perfect square (square number) is always a composite number.

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