30157052221 has 4 divisors (see below), whose sum is σ = 30158152672. Its totient is φ = 30155951772.

The previous prime is 30157052183. The next prime is 30157052227. The reversal of 30157052221 is 12225075103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12225075103 = 68071 ⋅179593.

It is a cyclic number.

It is not a de Polignac number, because 30157052221 - 2¹⁷ = 30156921149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30157052221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30157052227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508041 + ... + 564286.

It is an arithmetic number, because the mean of its divisors is an integer number (7539538168).

Almost surely, 2^30157052221 is an apocalyptic number.

It is an amenable number.

30157052221 is a deficient number, since it is larger than the sum of its proper divisors (1100451).

30157052221 is a wasteful number, since it uses less digits than its factorization.

30157052221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100450.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 30157052221 in words is "thirty billion, one hundred fifty-seven million, fifty-two thousand, two hundred twenty-one".