Slovenia (/slɵˈviːniə/ sloh-VEE-nee-ə; Slovene: Slovenija, [slɔˈʋèːnija]), officially the Republic of Slovenia (Republika Slovenija, [rɛˈpùːblika slɔˈʋèːnija], Slovene abbreviation: RS [rəˈsə̀]), is a nation state on the Adriatic Sea, bordering Italy to the west, Austria to the north, Croatia to the south and southeast, and Hungary to the northeast. It covers 20,273 square kilometers (7,827 sq mi) and has a population of 2.05 million. It is a parliamentary republic and a member of the European Union and NATO.