Translation:His characteristics are interesting.
As far as I am aware all nouns which end in the suffix -schaft are feminine and are pluralised by adding -en, so -schaften = plural of -schaft. The same applies to those ending in the suffixes -heit, -keit and -ung. There are words which end in -ung which aren't feminine but AFAIK those aren't suffixes (e.g. der Sprung is from springen, not Spr + -ung)