Is 21013 a prime number?

21 013 is an odd number, because it is not evenly divisible by 2.

Find out more:

• 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 21 013 is about 144.959.

Thus, the square root of 21 013 is not an integer, and therefore 21 013 is not a square number.

Anyway, 21 013 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 21 013) is the result of the product of this number (21 013) by itself (i.e., 21 013 × 21 013); the square of 21 013 is sometimes called "raising 21 013 to the power 2", or "21 013 squared".

The square of 21 013 is 441 546 169 because 21 013 × 21 013 = 21 013² = 441 546 169.

As a consequence, 21 013 is the square root of 441 546 169.

21 013 is a number with 5 digits.

The multiples of 21 013 are all integers evenly divisible by 21 013, that is all numbers such that the remainder of the division by 21 013 is zero. There are infinitely many multiples of 21 013. The smallest multiples of 21 013 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 013 too, since 0 × 21 013 = 0
• 21 013: indeed, 21 013 is a multiple of itself, since 21 013 is evenly divisible by 21 013 (we have 21 013 / 21 013 = 1, so the remainder of this division is indeed zero)
• 42 026: indeed, 42 026 = 21 013 × 2
• 63 039: indeed, 63 039 = 21 013 × 3
• 84 052: indeed, 84 052 = 21 013 × 4
• 105 065: indeed, 105 065 = 21 013 × 5
• etc.

• Preceding numbers: …21 011, 21 012
• Following numbers: 21 014, 21 015…

Nearest numbers from 21 013

• Preceding prime number: 21 011
• Following prime number: 21 017

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• 21 013 est-il un nombre premier ?