31313032312 has 8 divisors (see below), whose sum is σ = 58711935600. Its totient is φ = 15656516152.

The previous prime is 31313032307. The next prime is 31313032321. The reversal of 31313032312 is 21323031313.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 1957064512 + ... + 1957064527.

It is an arithmetic number, because the mean of its divisors is an integer number (7338991950).

Almost surely, 2^31313032312 is an apocalyptic number.

It is an amenable number.

31313032312 is a deficient number, since it is larger than the sum of its proper divisors (27398903288).

31313032312 is a wasteful number, since it uses less digits than its factorization.

31313032312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914129045 (or 3914129041 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31313032312 its reverse (21323031313), we get a palindrome (52636063625).

Subtracting from 31313032312 its reverse (21323031313), we obtain a palindrome (9990000999).

The spelling of 31313032312 in words is "thirty-one billion, three hundred thirteen million, thirty-two thousand, three hundred twelve".