hex to int for 32bit number

[tomer]

I want to convert hex to int for 332bit number.
I have use downloaded code:
===========================================
(defun int-to-bin-string (n &optional length)
  "Convert integer N to bit string (LENGTH, default 8)."
  (let* ((i    0)
         (len  (or length 8))
         (s    (make-string len ?0))
         )
    (while (< i len)
      (if (not (zerop (logand n (ash 1 i))))
          (aset s (- len (1+ i)) ?1))
      (setq i (1+ i))

===============================================

the code works only for integer and intereger in elisp is (i think) 29
bit.
is it possbile 32bit for integers?
Thanks
Tomer