31431013042 has 32 divisors (see below), whose sum is σ = 55399809024. Its totient is φ = 13185244800.

The previous prime is 31431013039. The next prime is 31431013067. The reversal of 31431013042 is 24031013413.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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, 2335918 + ... + 2349334.

It is an arithmetic number, because the mean of its divisors is an integer number (1731244032).

Almost surely, 2^31431013042 is an apocalyptic number.

31431013042 is a deficient number, since it is larger than the sum of its proper divisors (23968795982).

31431013042 is a wasteful number, since it uses less digits than its factorization.

31431013042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21634.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31431013042 its reverse (24031013413), we get a palindrome (55462026455).

The spelling of 31431013042 in words is "thirty-one billion, four hundred thirty-one million, thirteen thousand, forty-two".