25523269 has 4 divisors (see below), whose sum is σ = 25572780. Its totient is φ = 25473760.

The previous prime is 25523243. The next prime is 25523287. The reversal of 25523269 is 96232552.

It is a happy number.

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 2117025 + 23406244 = 1455^2 + 4838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25523269 is a prime.

It is a super-2 number, since 2×25523269² = 1302874520892722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25523299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23974 + ... + 25015.

It is an arithmetic number, because the mean of its divisors is an integer number (6393195).

Almost surely, 2^25523269 is an apocalyptic number.

It is an amenable number.

25523269 is a deficient number, since it is larger than the sum of its proper divisors (49511).

25523269 is an equidigital number, since it uses as much as digits as its factorization.

25523269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49510.

The product of its digits is 32400, while the sum is 34.

The square root of 25523269 is about 5052.0559181387. The cubic root of 25523269 is about 294.4277674771.

The spelling of 25523269 in words is "twenty-five million, five hundred twenty-three thousand, two hundred sixty-nine".