25313232500 has 30 divisors (see below), whose sum is σ = 55354982298. Its totient is φ = 10125292000.

The previous prime is 25313232493. The next prime is 25313232557. The reversal of 25313232500 is 523231352.

It can be written as a sum of positive squares in 5 ways, for example, as 2040509584 + 23272722916 = 45172^2 + 152554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25313232500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5060147 + ... + 5065146.

Almost surely, 2^25313232500 is an apocalyptic number.

25313232500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25313232500 is an abundant number, since it is smaller than the sum of its proper divisors (30041749798).

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

25313232500 is a wasteful number, since it uses less digits than its factorization.

25313232500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125317 (or 10125300 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 25313232500 its reverse (523231352), we get a palindrome (25836463852).

The spelling of 25313232500 in words is "twenty-five billion, three hundred thirteen million, two hundred thirty-two thousand, five hundred".