30005225921 has 4 divisors (see below), whose sum is σ = 32732973744. Its totient is φ = 27277478100.

The previous prime is 30005225911. The next prime is 30005225951. The reversal of 30005225921 is 12952250003.

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.

It is a cyclic number.

It is not a de Polignac number, because 30005225921 - 2³⁴ = 12825356737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30005225911) 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, 1363873895 + ... + 1363873916.

It is an arithmetic number, because the mean of its divisors is an integer number (8183243436).

Almost surely, 2^30005225921 is an apocalyptic number.

It is an amenable number.

30005225921 is a deficient number, since it is larger than the sum of its proper divisors (2727747823).

30005225921 is a wasteful number, since it uses less digits than its factorization.

30005225921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727747822.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 30005225921 its reverse (12952250003), we get a palindrome (42957475924).

The spelling of 30005225921 in words is "thirty billion, five million, two hundred twenty-five thousand, nine hundred twenty-one".