331031231312 has 40 divisors (see below), whose sum is σ = 644048882400. Its totient is φ = 164826410112.

The previous prime is 331031231287. The next prime is 331031231357. The reversal of 331031231312 is 213132130133.

It is a super-2 number, since 2×331031231312² (a number of 24 digits) contains 22 as substring.

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, 3954758 + ... + 4037594.

It is an arithmetic number, because the mean of its divisors is an integer number (16101222060).

Almost surely, 2^331031231312 is an apocalyptic number.

It is an amenable number.

331031231312 is a deficient number, since it is larger than the sum of its proper divisors (313017651088).

331031231312 is a wasteful number, since it uses less digits than its factorization.

331031231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83883 (or 83877 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 331031231312 its reverse (213132130133), we get a palindrome (544163361445).

The spelling of 331031231312 in words is "three hundred thirty-one billion, thirty-one million, two hundred thirty-one thousand, three hundred twelve".