Kenya (pron.: /ˈkɛnjə/ or /ˈkiːnjə/), officially the Republic of Kenya, is a sovereign state in East Africa. The capital and largest city is Nairobi. Kenya lies on the equator with the Indian Ocean to the south-east, Tanzania to the south, Uganda to the west, South Sudan to the north-west, Ethiopia to the north and Somalia to the north-east. Kenya covers 581,309 km2 (224,445 sq mi) and has a population of about 43½ million in early 2013. The country is named after Mount Kenya, the second highest mountain in Africa.