It's part of the type yet it's also a unique identifier. That's the whole thing with east or west const. const int * is a immutable mutable pointer that points to mutable immutable memory. int *const is a mutable immutable pointer that points to immutable memory. int const * is the same type as the first example, a immutable mutable pointer that points to mutable immutable memory.
Same stuff applies to references which makes it easier to think of the variable owning the * or & as if you want that pointer or reference to be const it has to go after.
Edit:I am a moron who managed to get it exactly backwards :|