khulafa-e-raashideen

The Khulafaa-e-Raashideen

Q: I have heard that Hazrat Mu'aawiyah (Radhiyallahu Anhu) is the fifth khalifa. I thought there are only four khalifas viz. Hazrat Abu Bakr, Hazrat Umar, Hazrat Uthmaan and Hazrat Ali (Radhiyallahu Anhum). Can you please give me the correct answer and was Hazrat Mu'aawiyah's (Radhiyallahu Anhu) status similar to the status of the four khalifas?