22526561 has 4 divisors (see below), whose sum is σ = 22536132. Its totient is φ = 22516992.

The previous prime is 22526551. The next prime is 22526573. The reversal of 22526561 is 16562522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21160000 + 1366561 = 4600^2 + 1169^2 .

It is a cyclic number.

It is not a de Polignac number, because 22526561 - 2²² = 18332257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22526531) 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, 1481 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (5634033).

Almost surely, 2^22526561 is an apocalyptic number.

It is an amenable number.

22526561 is a deficient number, since it is larger than the sum of its proper divisors (9571).

22526561 is an equidigital number, since it uses as much as digits as its factorization.

22526561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570.

The product of its digits is 7200, while the sum is 29.

The square root of 22526561 is about 4746.2154396951. The cubic root of 22526561 is about 282.4218532377.

The spelling of 22526561 in words is "twenty-two million, five hundred twenty-six thousand, five hundred sixty-one".