53 is the next one.
53
no
Yes.
No, it is composite.
21 is not a prime number.
composite.
It is composite.
The spelling of the ordinal number 51st is "fifty-first."
54 is a composite number, not prime, because 2, 3, and 6 also go into it.
It is 47.
No. 59 is a prime number.
No, two.