25252430013 has 6 divisors (see below), whose sum is σ = 36475732254. Its totient is φ = 16834953336.

The previous prime is 25252430009. The next prime is 25252430023. The reversal of 25252430013 is 31003425252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24449387769 + 803042244 = 156363^2 + 28338^2 .

It is not a de Polignac number, because 25252430013 - 2² = 25252430009 is a prime.

It is a super-2 number, since 2×25252430013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25252430023) 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, 1402912770 + ... + 1402912787.

It is an arithmetic number, because the mean of its divisors is an integer number (6079288709).

Almost surely, 2^25252430013 is an apocalyptic number.

It is an amenable number.

25252430013 is a deficient number, since it is larger than the sum of its proper divisors (11223302241).

25252430013 is a wasteful number, since it uses less digits than its factorization.

25252430013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805825563 (or 2805825560 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 25252430013 its reverse (31003425252), we get a palindrome (56255855265).

The spelling of 25252430013 in words is "twenty-five billion, two hundred fifty-two million, four hundred thirty thousand, thirteen".