It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 161 011 is not a prime number.
For example, 161 011 can be divided by 59: 161 011 / 59 = 2 729.
For 161 011 to be a prime number, it would have been required that 161 011 has only two divisors, i.e., itself and 1.
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161 011 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 161 011 is about 401.262.
Thus, the square root of 161 011 is not an integer, and therefore 161 011 is not a square number.
The square of a number (here 161 011) is the result of the product of this number (161 011) by itself (i.e., 161 011 × 161 011); the square of 161 011 is sometimes called "raising 161 011 to the power 2", or "161 011 squared".
The square of 161 011 is 25 924 542 121 because 161 011 × 161 011 = 161 0112 = 25 924 542 121.
As a consequence, 161 011 is the square root of 25 924 542 121.
The multiples of 161 011 are all integers evenly divisible by 161 011, that is all numbers such that the remainder of the division by 161 011 is zero. There are infinitely many multiples of 161 011. The smallest multiples of 161 011 are: