python如何写一个函数判断回文数？

# -*- coding: utf-8 -*-

"""

Created on Mon Aug  6 07:03:59 2018

@author: FanXiaoLei

"""

def hw(n):

    p=str(n)

    k=''.join(reversed(p))

    if k== p:

        return True

    else:

        return False

print(hw(121))

print(hw(1234531))