It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 55 491 489 is not a prime number.
For example, 55 491 489 can be divided by 3: 55 491 489 / 3 = 18 497 163.
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For 55 491 489 to be a prime number, it would have been required that 55 491 489 has only two divisors, i.e., itself and 1.
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55 491 489 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 55 491 489 is about 7 449.261.
Thus, the square root of 55 491 489 is not an integer, and therefore 55 491 489 is not a square number.
The square of a number (here 55 491 489) is the result of the product of this number (55 491 489) by itself (i.e., 55 491 489 × 55 491 489); the square of 55 491 489 is sometimes called "raising 55 491 489 to the power 2", or "55 491 489 squared".
The square of 55 491 489 is 3 079 305 351 437 121 because 55 491 489 × 55 491 489 = 55 491 4892 = 3 079 305 351 437 121.
As a consequence, 55 491 489 is the square root of 3 079 305 351 437 121.
55 491 489 is a number with 8 digits.
The multiples of 55 491 489 are all integers evenly divisible by 55 491 489, that is all numbers such that the remainder of the division by 55 491 489 is zero. There are infinitely many multiples of 55 491 489. The smallest multiples of 55 491 489 are: