Is 21825 a prime number?

21 825 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 21 825 is about 147.733.

Thus, the square root of 21 825 is not an integer, and therefore 21 825 is not a square number.

The square of a number (here 21 825) is the result of the product of this number (21 825) by itself (i.e., 21 825 × 21 825); the square of 21 825 is sometimes called "raising 21 825 to the power 2", or "21 825 squared".

The square of 21 825 is 476 330 625 because 21 825 × 21 825 = 21 825² = 476 330 625.

As a consequence, 21 825 is the square root of 476 330 625.

21 825 is a number with 5 digits.

The multiples of 21 825 are all integers evenly divisible by 21 825, that is all numbers such that the remainder of the division by 21 825 is zero. There are infinitely many multiples of 21 825. The smallest multiples of 21 825 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 825 too, since 0 × 21 825 = 0
• 21 825: indeed, 21 825 is a multiple of itself, since 21 825 is evenly divisible by 21 825 (we have 21 825 / 21 825 = 1, so the remainder of this division is indeed zero)
• 43 650: indeed, 43 650 = 21 825 × 2
• 65 475: indeed, 65 475 = 21 825 × 3
• 87 300: indeed, 87 300 = 21 825 × 4
• 109 125: indeed, 109 125 = 21 825 × 5
• etc.

• Preceding numbers: …21 823, 21 824
• Following numbers: 21 826, 21 827…

Nearest numbers from 21 825

• Preceding prime number: 21 821
• Following prime number: 21 839

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• 21 825 est-il un nombre premier ?