31312331042 has 16 divisors (see below), whose sum is σ = 50214183552. Its totient is φ = 14592152640.

The previous prime is 31312331041. The next prime is 31312331051. The reversal of 31312331042 is 24013321313.

It is a junction number, because it is equal to n+sod(n) for n = 31312330999 and 31312331017.

It is not an unprimeable number, because it can be changed into a prime (31312331041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4467134 + ... + 4474137.

It is an arithmetic number, because the mean of its divisors is an integer number (3138386472).

Almost surely, 2^31312331042 is an apocalyptic number.

31312331042 is a deficient number, since it is larger than the sum of its proper divisors (18901852510).

31312331042 is a wasteful number, since it uses less digits than its factorization.

31312331042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941393.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31312331042 its reverse (24013321313), we get a palindrome (55325652355).

The spelling of 31312331042 in words is "thirty-one billion, three hundred twelve million, three hundred thirty-one thousand, forty-two".