25512431131 has 16 divisors (see below), whose sum is σ = 29487702240. Its totient is φ = 21814894080.

The previous prime is 25512431129. The next prime is 25512431137. The reversal of 25512431131 is 13113421552.

It is a cyclic number.

It is not a de Polignac number, because 25512431131 - 2¹ = 25512431129 is a prime.

It is a super-2 number, since 2×25512431131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25512431131.

It is not an unprimeable number, because it can be changed into a prime (25512431137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255925 + ... + 341353.

It is an arithmetic number, because the mean of its divisors is an integer number (1842981390).

Almost surely, 2^25512431131 is an apocalyptic number.

25512431131 is a deficient number, since it is larger than the sum of its proper divisors (3975271109).

25512431131 is a wasteful number, since it uses less digits than its factorization.

25512431131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87054.

The product of its digits is 3600, while the sum is 28.

Adding to 25512431131 its reverse (13113421552), we get a palindrome (38625852683).

The spelling of 25512431131 in words is "twenty-five billion, five hundred twelve million, four hundred thirty-one thousand, one hundred thirty-one".