São Paulo is one of the 26 states of the Federative Republic of Brazil and is named after Saint Paul of Tarsus. As the richest Brazilian state and a major industrial complex, often dubbed the locomotive of Brazil, the state is responsible for 33.9% of the Brazilian GDP. São Paulo also has the second highest Human Development Index (HDI) and GDP per capita, the fourth lowest infant mortality rate, the third highest life expectancy, and the third lowest rate of illiteracy among the federative units of Brazil, being by far, the safest state in the country.
São Paulo alone is richer than Argentina, Uruguay, Paraguay and Bolivia combined. If São Paulo were an independent country, its nominal GDP would be ranked among the top 20 in the world (2010 estimate). The economy of São Paulo State is the most developed in Brazil.