It is a rational number, and an integer. I have never heard of a while number, though.
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Yes, 257 is an integer. An integer is any number that does not have a fractional or decimal part. 257 fits this definition as it is a whole number without any digits after the decimal point.
The square root of 257 is an irrational number, as it cannot be expressed as a fraction or whole number. It is a non-repeating, non-terminating decimal.
no,it is rational
257 is rational.
257 = 100000001