31503321042 has 32 divisors (see below), whose sum is σ = 63641217024. Its totient is φ = 10395705600.

The previous prime is 31503321023. The next prime is 31503321079. The reversal of 31503321042 is 24012330513.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306442 + ... + 396122.

It is an arithmetic number, because the mean of its divisors is an integer number (1988788032).

Almost surely, 2^31503321042 is an apocalyptic number.

31503321042 is an abundant number, since it is smaller than the sum of its proper divisors (32137895982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31503321042 is a wasteful number, since it uses less digits than its factorization.

31503321042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90274.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 31503321042 its reverse (24012330513), we get a palindrome (55515651555).

The spelling of 31503321042 in words is "thirty-one billion, five hundred three million, three hundred twenty-one thousand, forty-two".