25200027513 has 6 divisors (see below), whose sum is σ = 36400039754. Its totient is φ = 16800018336.

The previous prime is 25200027491. The next prime is 25200027529. The reversal of 25200027513 is 31572000252.

It can be written as a sum of positive squares in only one way, i.e., 23185543824 + 2014483689 = 152268^2 + 44883^2 .

It is not a de Polignac number, because 25200027513 - 2⁹ = 25200027001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25200020513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1400001520 + ... + 1400001537.

Almost surely, 2^25200027513 is an apocalyptic number.

It is an amenable number.

25200027513 is a deficient number, since it is larger than the sum of its proper divisors (11200012241).

25200027513 is a wasteful number, since it uses less digits than its factorization.

25200027513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800003063 (or 2800003060 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

Adding to 25200027513 its reverse (31572000252), we get a palindrome (56772027765).

The spelling of 25200027513 in words is "twenty-five billion, two hundred million, twenty-seven thousand, five hundred thirteen".