25431401313 has 12 divisors (see below), whose sum is σ = 36744516900. Its totient is φ = 16949527296.

The previous prime is 25431401299. The next prime is 25431401339. The reversal of 25431401313 is 31310413452.

It is a happy number.

25431401313 is a `hidden beast` number, since 254 + 3 + 1 + 401 + 3 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6798332304 + 18633069009 = 82452^2 + 136503^2 .

It is not a de Polignac number, because 25431401313 - 2⁴ = 25431401297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25431401383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360888 + ... + 425561.

It is an arithmetic number, because the mean of its divisors is an integer number (3062043075).

Almost surely, 2^25431401313 is an apocalyptic number.

It is an amenable number.

25431401313 is a deficient number, since it is larger than the sum of its proper divisors (11313115587).

25431401313 is a wasteful number, since it uses less digits than its factorization.

25431401313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790048 (or 790045 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 25431401313 its reverse (31310413452), we get a palindrome (56741814765).

The spelling of 25431401313 in words is "twenty-five billion, four hundred thirty-one million, four hundred one thousand, three hundred thirteen".