25231252013 has 4 divisors (see below), whose sum is σ = 27525002208. Its totient is φ = 22937501820.

The previous prime is 25231251979. The next prime is 25231252019. The reversal of 25231252013 is 31025213252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25231252013 - 2¹⁴ = 25231235629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231252019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146875081 + ... + 1146875102.

It is an arithmetic number, because the mean of its divisors is an integer number (6881250552).

Almost surely, 2^25231252013 is an apocalyptic number.

It is an amenable number.

25231252013 is a deficient number, since it is larger than the sum of its proper divisors (2293750195).

25231252013 is a wasteful number, since it uses less digits than its factorization.

25231252013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293750194.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 25231252013 its reverse (31025213252), we get a palindrome (56256465265).

The spelling of 25231252013 in words is "twenty-five billion, two hundred thirty-one million, two hundred fifty-two thousand, thirteen".