def ip_int_to_string(ipint):
    """Convert an integer to a string IPv4 address"""
    if ipint > 4294967295: #255.255.255.255
        return ''
    x4 = ipint % 256
    ipint = ipint >> 8
    x3 = ipint % 256
    ipint = ipint >> 8
    x2 = ipint % 256
    ipint = ipint >> 8
    x1 = ipint % 256
    return str(x1) + "." + str(x2) + "." + str(x3) + "." + str(x4)