Can my phone be rooted?
Yup, HTC Desire 530 can be rooted. Check out:

http://www.androidinfotech.com/2016/12/root-htc-desire-530-marshmallow-twrp.html

https://rootthat.blogspot.in/2016/06/how-to-root-htc-desire-530.html

The PC version of Kingo Root works as well.