22652537221 has 4 divisors (see below), whose sum is σ = 22705095744. Its totient is φ = 22599978700.

The previous prime is 22652537207. The next prime is 22652537249. The reversal of 22652537221 is 12273525622.

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 22652537221 - 2²³ = 22644148613 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 (22652531221) 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, 26278615 + ... + 26279476.

It is an arithmetic number, because the mean of its divisors is an integer number (5676273936).

Almost surely, 2^22652537221 is an apocalyptic number.

It is an amenable number.

22652537221 is a deficient number, since it is larger than the sum of its proper divisors (52558523).

22652537221 is an equidigital number, since it uses as much as digits as its factorization.

22652537221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52558522.

The product of its digits is 100800, while the sum is 37.

The spelling of 22652537221 in words is "twenty-two billion, six hundred fifty-two million, five hundred thirty-seven thousand, two hundred twenty-one".