The classification of real numbers is as follows.
1) rational number:
it is the number that can be written as the division of two integers.
The real number 5 can be written as,
2) Natural numbers:
the natural numbers are used in counting.
So, the number 5 is natural number.
3) Integers:
It includes positive , negative and zero .
thus, 5 is integrer.
4) whole number:
The numbers which include all positive numbers and zero.
So, 5 is whole number.
5) Irrational number:
it is the number that can not be written as the simple fraction.
So, 5 is not the irrational number.