22656032521 has 4 divisors (see below), whose sum is σ = 22657164100. Its totient is φ = 22654900944.

The previous prime is 22656032491. The next prime is 22656032533. The reversal of 22656032521 is 12523065622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20602583296 + 2053449225 = 143536^2 + 45315^2 .

It is a cyclic number.

It is not a de Polignac number, because 22656032521 - 2⁷ = 22656032393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22656032551) 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, 535206 + ... + 575983.

It is an arithmetic number, because the mean of its divisors is an integer number (5664291025).

Almost surely, 2^22656032521 is an apocalyptic number.

It is an amenable number.

22656032521 is a deficient number, since it is larger than the sum of its proper divisors (1131579).

22656032521 is a wasteful number, since it uses less digits than its factorization.

22656032521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131578.

The product of its (nonzero) digits is 43200, while the sum is 34.

It can be divided in two parts, 226560 and 32521, that added together give a square (259081 = 509²).

The spelling of 22656032521 in words is "twenty-two billion, six hundred fifty-six million, thirty-two thousand, five hundred twenty-one".