Ireland (often referred to as the Republic of Ireland or by its Irish name, Éire) covers an area of approximately 70,200 sq km. Its terrain mostly consists of level to rolling interior plain surrounded by rugged hills and low mountains. Ireland borders Northern Ireland (part of the UK), and has 1,448 km of coastline. The country is divided into 26 counties: Carlow, Cavan, Clare, Cork, Donegal, Dublin, Galway, Kerry, Kildare, Kilkenny, Laois, Leitrim, Limerick, Longford, Louth, Mayo, Meath, Monaghan, Offaly, Roscommon, Sligo, Tipperary, Waterford, Westmeath, Wexford and Wicklow. Dublin is the capital, with a time zone aligned with GMT. The currency is the euro, and exports include machinery and equipment, chemicals and foodstuffs. The population of approximately 4,200,000 people comprises an ethnic makeup that is 87.4% Irish. The primary languages are English and Irish, and the predominant religion is Christianity.