Is 8221 a prime number?

8 221 is an odd number, because it is not evenly divisible by 2.

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• What is an even 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 8 221 is about 90.670.

Thus, the square root of 8 221 is not an integer, and therefore 8 221 is not a square number.

Anyway, 8 221 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 8 221) is the result of the product of this number (8 221) by itself (i.e., 8 221 × 8 221); the square of 8 221 is sometimes called "raising 8 221 to the power 2", or "8 221 squared".

The square of 8 221 is 67 584 841 because 8 221 × 8 221 = 8 221² = 67 584 841.

As a consequence, 8 221 is the square root of 67 584 841.

8 221 is a number with 4 digits.

The multiples of 8 221 are all integers evenly divisible by 8 221, that is all numbers such that the remainder of the division by 8 221 is zero. There are infinitely many multiples of 8 221. The smallest multiples of 8 221 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 8 221 too, since 0 × 8 221 = 0
• 8 221: indeed, 8 221 is a multiple of itself, since 8 221 is evenly divisible by 8 221 (we have 8 221 / 8 221 = 1, so the remainder of this division is indeed zero)
• 16 442: indeed, 16 442 = 8 221 × 2
• 24 663: indeed, 24 663 = 8 221 × 3
• 32 884: indeed, 32 884 = 8 221 × 4
• 41 105: indeed, 41 105 = 8 221 × 5
• etc.

• Preceding numbers: …8 219, 8 220
• Following numbers: 8 222, 8 223…

Nearest numbers from 8 221

• Preceding prime number: 8 219
• Following prime number: 8 231

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• 8 221 est-il un nombre premier ?