30000221765 has 32 divisors (see below), whose sum is σ = 37149235200. Its totient is φ = 23247708480.

The previous prime is 30000221743. The next prime is 30000221791. The reversal of 30000221765 is 56712200003.

It is not a de Polignac number, because 30000221765 - 2⁸ = 30000221509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10747520 + ... + 10750310.

It is an arithmetic number, because the mean of its divisors is an integer number (1160913600).

Almost surely, 2^30000221765 is an apocalyptic number.

It is an amenable number.

30000221765 is a deficient number, since it is larger than the sum of its proper divisors (7149013435).

30000221765 is a wasteful number, since it uses less digits than its factorization.

30000221765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377.

The product of its (nonzero) digits is 2520, while the sum is 26.

Adding to 30000221765 its reverse (56712200003), we get a palindrome (86712421768).

The spelling of 30000221765 in words is "thirty billion, two hundred twenty-one thousand, seven hundred sixty-five".