Is 2191 a prime number?

2 191 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 2 191 is about 46.808.

Thus, the square root of 2 191 is not an integer, and therefore 2 191 is not a square number.

The square of a number (here 2 191) is the result of the product of this number (2 191) by itself (i.e., 2 191 × 2 191); the square of 2 191 is sometimes called "raising 2 191 to the power 2", or "2 191 squared".

The square of 2 191 is 4 800 481 because 2 191 × 2 191 = 2 191² = 4 800 481.

As a consequence, 2 191 is the square root of 4 800 481.

2 191 is a number with 4 digits.

The multiples of 2 191 are all integers evenly divisible by 2 191, that is all numbers such that the remainder of the division by 2 191 is zero. There are infinitely many multiples of 2 191. The smallest multiples of 2 191 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 2 191 too, since 0 × 2 191 = 0
• 2 191: indeed, 2 191 is a multiple of itself, since 2 191 is evenly divisible by 2 191 (we have 2 191 / 2 191 = 1, so the remainder of this division is indeed zero)
• 4 382: indeed, 4 382 = 2 191 × 2
• 6 573: indeed, 6 573 = 2 191 × 3
• 8 764: indeed, 8 764 = 2 191 × 4
• 10 955: indeed, 10 955 = 2 191 × 5
• etc.

• Preceding numbers: …2 189, 2 190
• Following numbers: 2 192, 2 193…

Nearest numbers from 2 191

• Preceding prime number: 2 179
• Following prime number: 2 203

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• 2 191 est-il un nombre premier ?