It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 488 216 521 is not a prime number.
For example, 488 216 521 can be divided by 13: 488 216 521 / 13 = 37 555 117.
For 488 216 521 to be a prime number, it would have been required that 488 216 521 has only two divisors, i.e., itself and 1.
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488 216 521 is an odd number, because it is not evenly divisible by 2.
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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 488 216 521 is about 22 095.622.
Thus, the square root of 488 216 521 is not an integer, and therefore 488 216 521 is not a square number.
The square of a number (here 488 216 521) is the result of the product of this number (488 216 521) by itself (i.e., 488 216 521 × 488 216 521); the square of 488 216 521 is sometimes called "raising 488 216 521 to the power 2", or "488 216 521 squared".
The square of 488 216 521 is 238 355 371 377 343 456 because 488 216 521 × 488 216 521 = 488 216 5212 = 238 355 371 377 343 456.
As a consequence, 488 216 521 is the square root of 238 355 371 377 343 456.
488 216 521 is a number with 9 digits.
The multiples of 488 216 521 are all integers evenly divisible by 488 216 521, that is all numbers such that the remainder of the division by 488 216 521 is zero. There are infinitely many multiples of 488 216 521. The smallest multiples of 488 216 521 are: