True, but I think this is referring to something else? If not, it’s very poorly written, since it refers to neutrons, not combinations of neutrons and protons.
It is definitely poorly written.
Indium with 82 neutrons would be In-131, a beta emitter with a t1/2 of .282 seconds. There are a couple of In-131 metastable isotopes too.
131 is not a predicted magic number though.