31312212012344 has 32 divisors (see below), whose sum is σ = 59516483620320. Its totient is φ = 15441162932736.

The previous prime is 31312212012311. The next prime is 31312212012379. The reversal of 31312212012344 is 44321021221313.

It is a happy number.

It is a super-3 number, since 3×31312212012344³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18528389 + ... + 20147595.

It is an arithmetic number, because the mean of its divisors is an integer number (1859890113135).

Almost surely, 2^{31312212012344} is an apocalyptic number.

It is an amenable number.

31312212012344 is a deficient number, since it is larger than the sum of its proper divisors (28204271607976).

31312212012344 is a wasteful number, since it uses less digits than its factorization.

31312212012344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652399 (or 1652395 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 31312212012344 its reverse (44321021221313), we get a palindrome (75633233233657).

The spelling of 31312212012344 in words is "thirty-one trillion, three hundred twelve billion, two hundred twelve million, twelve thousand, three hundred forty-four".