31031042402 has 16 divisors (see below), whose sum is σ = 49001771040. Its totient is φ = 14697298368.

The previous prime is 31031042381. The next prime is 31031042417. The reversal of 31031042402 is 20424013013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350378 + ... + 429914.

It is an arithmetic number, because the mean of its divisors is an integer number (3062610690).

Almost surely, 2^31031042402 is an apocalyptic number.

31031042402 is a deficient number, since it is larger than the sum of its proper divisors (17970728638).

31031042402 is a wasteful number, since it uses less digits than its factorization.

31031042402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89825.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31031042402 its reverse (20424013013), we get a palindrome (51455055415).

The spelling of 31031042402 in words is "thirty-one billion, thirty-one million, forty-two thousand, four hundred two".