22811571225 has 27 divisors (see below), whose sum is σ = 40862116893. Its totient is φ = 12164963040.

The previous prime is 22811571173. The next prime is 22811571253. The reversal of 22811571225 is 52217511822.

The square root of 22811571225 is 151035.

It is a perfect power (a square), and thus also a powerful number.

22811571225 is a `hidden beast` number, since 2 + 2 + 81 + 1 + 571 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3454970841 + 19356600384 = 58779^2 + 139128^2 .

It is not a de Polignac number, because 22811571225 - 2²⁷ = 22677353497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22811571225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2260491 + ... + 2270559.

Almost surely, 2^22811571225 is an apocalyptic number.

22811571225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22811571225 is the 151035-th square number.

22811571225 is the 75518-th centered octagonal number.

It is an amenable number.

22811571225 is a deficient number, since it is larger than the sum of its proper divisors (18050545668).

22811571225 is an frugal number, since it uses more digits than its factorization.

22811571225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20154 (or 10077 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

Multiplying 22811571225 by its sum of digits (36), we get a square (821216564100 = 906210²).

The spelling of 22811571225 in words is "twenty-two billion, eight hundred eleven million, five hundred seventy-one thousand, two hundred twenty-five".