22530197621 has 4 divisors (see below), whose sum is σ = 22665109152. Its totient is φ = 22395286092.

The previous prime is 22530197611. The next prime is 22530197681. The reversal of 22530197621 is 12679103522.

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 22530197621 - 2¹⁴ = 22530181237 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 (22530197611) 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, 67455515 + ... + 67455848.

It is an arithmetic number, because the mean of its divisors is an integer number (5666277288).

Almost surely, 2^22530197621 is an apocalyptic number.

It is an amenable number.

22530197621 is a deficient number, since it is larger than the sum of its proper divisors (134911531).

22530197621 is a wasteful number, since it uses less digits than its factorization.

22530197621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134911530.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 22530197621 in words is "twenty-two billion, five hundred thirty million, one hundred ninety-seven thousand, six hundred twenty-one".