It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 155 169 is not a prime number.
For example, 155 169 can be divided by 3: 155 169 / 3 = 51 723.
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For 155 169 to be a prime number, it would have been required that 155 169 has only two divisors, i.e., itself and 1.
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155 169 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 155 169 is about 393.915.
Thus, the square root of 155 169 is not an integer, and therefore 155 169 is not a square number.
The square of a number (here 155 169) is the result of the product of this number (155 169) by itself (i.e., 155 169 × 155 169); the square of 155 169 is sometimes called "raising 155 169 to the power 2", or "155 169 squared".
The square of 155 169 is 24 077 418 561 because 155 169 × 155 169 = 155 1692 = 24 077 418 561.
As a consequence, 155 169 is the square root of 24 077 418 561.
The multiples of 155 169 are all integers evenly divisible by 155 169, that is all numbers such that the remainder of the division by 155 169 is zero. There are infinitely many multiples of 155 169. The smallest multiples of 155 169 are: