25323505 has 4 divisors (see below), whose sum is σ = 30388212. Its totient is φ = 20258800.

The previous prime is 25323469. The next prime is 25323533. The reversal of 25323505 is 50532352.

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 8579041 + 16744464 = 2929^2 + 4092^2 .

It is not a de Polignac number, because 25323505 - 2⁷ = 25323377 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 25323505.

It is an unprimeable number.

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, 2532346 + ... + 2532355.

It is an arithmetic number, because the mean of its divisors is an integer number (7597053).

Almost surely, 2^25323505 is an apocalyptic number.

It is an amenable number.

25323505 is a deficient number, since it is larger than the sum of its proper divisors (5064707).

25323505 is an equidigital number, since it uses as much as digits as its factorization.

25323505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064706.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 25323505 is about 5032.2465162192. The cubic root of 25323505 is about 293.6576181506.

Adding to 25323505 its reverse (50532352), we get a palindrome (75855857).

The spelling of 25323505 in words is "twenty-five million, three hundred twenty-three thousand, five hundred five".