/usr/lib/x86_64-linux-gnu/librtlsdr.so.0 is in librtlsdr0 0.5.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/librtlsdr.so.0.5.3
/usr/lib/x86_64-linux-gnu/librtlsdr.so.0.5.3