31387888503 has 8 divisors (see below), whose sum is σ = 46500575600. Its totient is φ = 20925258984.

The previous prime is 31387888501. The next prime is 31387888513. The reversal of 31387888503 is 30588878313.

31387888503 is a `hidden beast` number, since 31 + 38 + 78 + 8 + 8 + 503 = 666.

It is not a de Polignac number, because 31387888503 - 2¹ = 31387888501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31387888503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31387888501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581257168 + ... + 581257221.

It is an arithmetic number, because the mean of its divisors is an integer number (5812571950).

Almost surely, 2^31387888503 is an apocalyptic number.

31387888503 is a deficient number, since it is larger than the sum of its proper divisors (15112687097).

31387888503 is a wasteful number, since it uses less digits than its factorization.

31387888503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162514398 (or 1162514392 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 31387888503 in words is "thirty-one billion, three hundred eighty-seven million, eight hundred eighty-eight thousand, five hundred three".