protein is made up of amino acids, the building blocks of muscle. therefore an adequate amount is required each day to repair and build muscle tissue.
if your goal is to build muscle then no, that is not enough protein. you should aim for the minimum of 1g/lb bodyweight, 1.5g/lb being ideal. You should also be eating smaller more frequent meals, every 2.5-3hrs max, each one having a protein source to keep a steady flow of amino acids in your blood.