30533552221 has 2 divisors, whose sum is σ = 30533552222. Its totient is φ = 30533552220.

The previous prime is 30533552213. The next prime is 30533552243. The reversal of 30533552221 is 12225533503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21392280121 + 9141272100 = 146261^2 + 95610^2 .

It is an emirp because it is prime and its reverse (12225533503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30533552221 - 2³ = 30533552213 is a prime.

It is a super-2 number, since 2×30533552221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30533552261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15266776110 + 15266776111.

It is an arithmetic number, because the mean of its divisors is an integer number (15266776111).

Almost surely, 2^30533552221 is an apocalyptic number.

It is an amenable number.

30533552221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30533552221 is an equidigital number, since it uses as much as digits as its factorization.

30533552221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 30533552221 in words is "thirty billion, five hundred thirty-three million, five hundred fifty-two thousand, two hundred twenty-one".