The part number is CAP CER 56PF 50V C0G/NP0 2220. It's a ceramic capacitor with the designation C0G, also known as NP0, that operates at 50 volts DC. The value of this component is 56 picofarads (pF) and it has a tolerance of ±10%. The case size is 2220, which is equivalent to 5750 in metric measurements.