25115311430 has 64 divisors (see below), whose sum is σ = 50654419200. Its totient is φ = 8886837120.

The previous prime is 25115311399. The next prime is 25115311433. The reversal of 25115311430 is 3411351152.

It is a self number, because there is not a number n which added to its sum of digits gives 25115311430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25115311433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1262501 + ... + 1282239.

It is an arithmetic number, because the mean of its divisors is an integer number (791475300).

Almost surely, 2^25115311430 is an apocalyptic number.

25115311430 is an abundant number, since it is smaller than the sum of its proper divisors (25539107770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25115311430 is a wasteful number, since it uses less digits than its factorization.

25115311430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20069.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 25115311430 its reverse (3411351152), we get a palindrome (28526662582).

The spelling of 25115311430 in words is "twenty-five billion, one hundred fifteen million, three hundred eleven thousand, four hundred thirty".