31313143042 has 32 divisors (see below), whose sum is σ = 48880247040. Its totient is φ = 15033432960.

The previous prime is 31313143003. The next prime is 31313143049. The reversal of 31313143042 is 24034131313.

It is a junction number, because it is equal to n+sod(n) for n = 31313142998 and 31313143016.

It is not an unprimeable number, because it can be changed into a prime (31313143049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2884048 + ... + 2894884.

It is an arithmetic number, because the mean of its divisors is an integer number (1527507720).

Almost surely, 2^31313143042 is an apocalyptic number.

31313143042 is a deficient number, since it is larger than the sum of its proper divisors (17567103998).

31313143042 is a wasteful number, since it uses less digits than its factorization.

31313143042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11466.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31313143042 its reverse (24034131313), we get a palindrome (55347274355).

The spelling of 31313143042 in words is "thirty-one billion, three hundred thirteen million, one hundred forty-three thousand, forty-two".