31311113403 has 16 divisors (see below), whose sum is σ = 43949347200. Its totient is φ = 19773673920.

The previous prime is 31311113381. The next prime is 31311113461. The reversal of 31311113403 is 30431111313.

It is not a de Polignac number, because 31311113403 - 2⁹ = 31311112891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31311113403.

It is not an unprimeable number, because it can be changed into a prime (31311113203) 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 15 ways as a sum of consecutive naturals, for example, 969703 + ... + 1001471.

It is an arithmetic number, because the mean of its divisors is an integer number (2746834200).

Almost surely, 2^31311113403 is an apocalyptic number.

31311113403 is a deficient number, since it is larger than the sum of its proper divisors (12638233797).

31311113403 is a wasteful number, since it uses less digits than its factorization.

31311113403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49082.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31311113403 its reverse (30431111313), we get a palindrome (61742224716).

The spelling of 31311113403 in words is "thirty-one billion, three hundred eleven million, one hundred thirteen thousand, four hundred three".