Is 221 A Prime Or Composite Number? - Cuemath

Is 221 a Prime Number?

Is 221 a prime number? A prime number is divisible only by 1 and itself, which means it has no other divisor except 1 and the number itself. On the contrary, composite numbers have more than two factors. To determine if 221 is a prime number or composite, we need to divide it with numbers from 1 to 221. To find out the answer to this question "is 221 is a prime number" and to gain a detailed understanding of "how and why is 221 a prime number or a composite number?" Let's learn more.

• Is 221 a prime number? - No
• Is 221 a composite number? - Yes
• Prime Factors of 221 - 13, 17
• Factors of 221 - 1, 13, 17, 221
• Is 221 a perfect square? - No

Is 221 a Prime Number?

No, 221 is not a prime number. The number 221 is divisible by 1, 13, 17, 221. For a number to be classified as a prime number, it should have exactly two factors. Since 221 has more than two factors, i.e. 1, 13, 17, 221, it is not a prime number.

Why is 221 not a Prime Number?

To understand whether 221 is composite or prime, it is important to find its factors.

Factors of 221: 1, 13, 17, 221

Since 221 has more than 2 factors, we can say that 221 is not a prime number.

☛ Prime Number Calculator

Is 221 a Composite Number?

Yes, since 221 has more than two factors i.e. 1, 13, 17, 221. In other words, 221 is a composite number because 221 has more than 2 factors.

Problem Statements:

Is 221 a Prime Number?	No
Is 221 a Composite Number?	Yes
Is 221 a Perfect Cube?	No
Is 221 a Perfect Square?	No
Is 221 an Even Number?	No
Square Root of 221	14.866069
Multiples of 221	221, 442, 663, 884, 1105, 1326, 1547, 1768, 1989, 2210
Is 221 an Odd Number?	Yes
Cube Root of 221	6.045933
Square of 221	48841

Fun Facts:

• A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 10601, 11311, 12421
• 23 is the smallest prime number having consecutive digits.
• A pair of prime numbers X and Y are said to be twin prime numbers if the absolute difference between them is 2. Example - (311, 313) are twin prime numbers.

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