For a communist party in Europe that is very sizeable. Also, not all parties take membership equally seriously. In the US membership in the Democrat and Republican parties is huge but it is virtually meaningless. Compare with Germany where the two largest parties CDU and SPD only have around 365-370k members.

In general, communist parties take membership much more seriously than most liberal bourgeois parties do. There is a higher standard set on members, there are requirements in terms of party discipline and theoretical-ideological education, and more obligations and expectations. Communist parties are vanguard parties. There are many times more sympathizers and supporters than there are actual members, and that's the way it's supposed to be.

But yes, even with all that, of course it is very diminished compared to what the CPSU used to be. One day, inshallah, that will come back.