Is 21481 a prime number?

21 481 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 21 481 is about 146.564.

Thus, the square root of 21 481 is not an integer, and therefore 21 481 is not a square number.

Anyway, 21 481 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 21 481) is the result of the product of this number (21 481) by itself (i.e., 21 481 × 21 481); the square of 21 481 is sometimes called "raising 21 481 to the power 2", or "21 481 squared".

The square of 21 481 is 461 433 361 because 21 481 × 21 481 = 21 481² = 461 433 361.

As a consequence, 21 481 is the square root of 461 433 361.

21 481 is a number with 5 digits.

The multiples of 21 481 are all integers evenly divisible by 21 481, that is all numbers such that the remainder of the division by 21 481 is zero. There are infinitely many multiples of 21 481. The smallest multiples of 21 481 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 481 too, since 0 × 21 481 = 0
• 21 481: indeed, 21 481 is a multiple of itself, since 21 481 is evenly divisible by 21 481 (we have 21 481 / 21 481 = 1, so the remainder of this division is indeed zero)
• 42 962: indeed, 42 962 = 21 481 × 2
• 64 443: indeed, 64 443 = 21 481 × 3
• 85 924: indeed, 85 924 = 21 481 × 4
• 107 405: indeed, 107 405 = 21 481 × 5
• etc.

• Preceding numbers: …21 479, 21 480
• Following numbers: 21 482, 21 483…

Nearest numbers from 21 481

• Preceding prime number: 21 467
• Following prime number: 21 487

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• 21 481 est-il un nombre premier ?