22565252161 has 4 divisors (see below), whose sum is σ = 22764944772. Its totient is φ = 22365559552.

The previous prime is 22565252117. The next prime is 22565252189. The reversal of 22565252161 is 16125256522.

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 9444924225 + 13120327936 = 97185^2 + 114544^2 .

It is a cyclic number.

It is not a de Polignac number, because 22565252161 - 2¹⁹ = 22564727873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22565252161.

It is not an unprimeable number, because it can be changed into a prime (22565252461) 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, 99846136 + ... + 99846361.

It is an arithmetic number, because the mean of its divisors is an integer number (5691236193).

Almost surely, 2^22565252161 is an apocalyptic number.

It is an amenable number.

22565252161 is a deficient number, since it is larger than the sum of its proper divisors (199692611).

22565252161 is a wasteful number, since it uses less digits than its factorization.

22565252161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199692610.

The product of its digits is 72000, while the sum is 37.

The spelling of 22565252161 in words is "twenty-two billion, five hundred sixty-five million, two hundred fifty-two thousand, one hundred sixty-one".