It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 161 013 is not a prime number.
For example, 161 013 can be divided by 3: 161 013 / 3 = 53 671.
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For 161 013 to be a prime number, it would have been required that 161 013 has only two divisors, i.e., itself and 1.
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161 013 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 161 013 is about 401.264.
Thus, the square root of 161 013 is not an integer, and therefore 161 013 is not a square number.
The square of a number (here 161 013) is the result of the product of this number (161 013) by itself (i.e., 161 013 × 161 013); the square of 161 013 is sometimes called "raising 161 013 to the power 2", or "161 013 squared".
The square of 161 013 is 25 925 186 169 because 161 013 × 161 013 = 161 0132 = 25 925 186 169.
As a consequence, 161 013 is the square root of 25 925 186 169.
The multiples of 161 013 are all integers evenly divisible by 161 013, that is all numbers such that the remainder of the division by 161 013 is zero. There are infinitely many multiples of 161 013. The smallest multiples of 161 013 are: