30643770221 has 4 divisors (see below), whose sum is σ = 30645324000. Its totient is φ = 30642216444.

The previous prime is 30643770211. The next prime is 30643770239. The reversal of 30643770221 is 12207734603.

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: 12207734603 = 373 ⋅32728511.

It is a cyclic number.

It is not a de Polignac number, because 30643770221 - 2¹⁰ = 30643769197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30643770211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746921 + ... + 786878.

It is an arithmetic number, because the mean of its divisors is an integer number (7661331000).

Almost surely, 2^30643770221 is an apocalyptic number.

It is an amenable number.

30643770221 is a deficient number, since it is larger than the sum of its proper divisors (1553779).

30643770221 is a wasteful number, since it uses less digits than its factorization.

30643770221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553778.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 30643770221 in words is "thirty billion, six hundred forty-three million, seven hundred seventy thousand, two hundred twenty-one".