25522661 has 4 divisors (see below), whose sum is σ = 27024012. Its totient is φ = 24021312.

The previous prime is 25522649. The next prime is 25522669. The reversal of 25522661 is 16622552.

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 8300161 + 17222500 = 2881^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 25522661 - 2¹⁰ = 25521637 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 (25522669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750650 + ... + 750683.

It is an arithmetic number, because the mean of its divisors is an integer number (6756003).

Almost surely, 2^25522661 is an apocalyptic number.

It is an amenable number.

25522661 is a deficient number, since it is larger than the sum of its proper divisors (1501351).

25522661 is a wasteful number, since it uses less digits than its factorization.

25522661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501350.

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

The square root of 25522661 is about 5051.9957442579. The cubic root of 25522661 is about 294.4254295646.

The spelling of 25522661 in words is "twenty-five million, five hundred twenty-two thousand, six hundred sixty-one".