Is 2155 a prime number?

2 155 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 2 155 is about 46.422.

Thus, the square root of 2 155 is not an integer, and therefore 2 155 is not a square number.

The square of a number (here 2 155) is the result of the product of this number (2 155) by itself (i.e., 2 155 × 2 155); the square of 2 155 is sometimes called "raising 2 155 to the power 2", or "2 155 squared".

The square of 2 155 is 4 644 025 because 2 155 × 2 155 = 2 155² = 4 644 025.

As a consequence, 2 155 is the square root of 4 644 025.

2 155 is a number with 4 digits.

The multiples of 2 155 are all integers evenly divisible by 2 155, that is all numbers such that the remainder of the division by 2 155 is zero. There are infinitely many multiples of 2 155. The smallest multiples of 2 155 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 2 155 too, since 0 × 2 155 = 0
• 2 155: indeed, 2 155 is a multiple of itself, since 2 155 is evenly divisible by 2 155 (we have 2 155 / 2 155 = 1, so the remainder of this division is indeed zero)
• 4 310: indeed, 4 310 = 2 155 × 2
• 6 465: indeed, 6 465 = 2 155 × 3
• 8 620: indeed, 8 620 = 2 155 × 4
• 10 775: indeed, 10 775 = 2 155 × 5
• etc.

• Preceding numbers: …2 153, 2 154
• Following numbers: 2 156, 2 157…

Nearest numbers from 2 155

• Preceding prime number: 2 153
• Following prime number: 2 161

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• 2 155 est-il un nombre premier ?