31213430044312 has 16 divisors (see below), whose sum is σ = 59349479662800. Its totient is φ = 15386902134240.

The previous prime is 31213430044249. The next prime is 31213430044319. The reversal of 31213430044312 is 21344003431213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213430044319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27476610387 + ... + 27476611522.

It is an arithmetic number, because the mean of its divisors is an integer number (3709342478925).

Almost surely, 2^{31213430044312} is an apocalyptic number.

It is an amenable number.

31213430044312 is a deficient number, since it is larger than the sum of its proper divisors (28136049618488).

31213430044312 is a wasteful number, since it uses less digits than its factorization.

31213430044312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54953221986 (or 54953221982 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31213430044312 its reverse (21344003431213), we get a palindrome (52557433475525).

The spelling of 31213430044312 in words is "thirty-one trillion, two hundred thirteen billion, four hundred thirty million, forty-four thousand, three hundred twelve".