13831431508 has 12 divisors (see below), whose sum is σ = 24795371412. Its totient is φ = 6747039680.

The previous prime is 13831431491. The next prime is 13831431517. The reversal of 13831431508 is 80513413831.

13831431508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4089346704 + 9742084804 = 63948^2 + 98702^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42168835 + ... + 42169162.

It is an arithmetic number, because the mean of its divisors is an integer number (2066280951).

Almost surely, 2^13831431508 is an apocalyptic number.

It is an amenable number.

13831431508 is a deficient number, since it is larger than the sum of its proper divisors (10963939904).

13831431508 is a wasteful number, since it uses less digits than its factorization.

13831431508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84338042 (or 84338040 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 13831431508 in words is "thirteen billion, eight hundred thirty-one million, four hundred thirty-one thousand, five hundred eight".