25318243 has 4 divisors (see below), whose sum is σ = 25446960. Its totient is φ = 25189528.

The previous prime is 25318231. The next prime is 25318273. The reversal of 25318243 is 34281352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25318243 - 2⁵ = 25318211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25318213) 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, 64063 + ... + 64456.

It is an arithmetic number, because the mean of its divisors is an integer number (6361740).

Almost surely, 2^25318243 is an apocalyptic number.

25318243 is a deficient number, since it is larger than the sum of its proper divisors (128717).

25318243 is a wasteful number, since it uses less digits than its factorization.

25318243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128716.

The product of its digits is 5760, while the sum is 28.

The square root of 25318243 is about 5031.7236609337. The cubic root of 25318243 is about 293.6372769244.

Adding to 25318243 its reverse (34281352), we get a palindrome (59599595).

It can be divided in two parts, 253 and 18243, that added together give a square (18496 = 136²).

The spelling of 25318243 in words is "twenty-five million, three hundred eighteen thousand, two hundred forty-three".