31123443312 has 60 divisors (see below), whose sum is σ = 93802605624. Its totient is φ = 9576443520.

The previous prime is 31123443269. The next prime is 31123443313. The reversal of 31123443312 is 21334432113.

It is a happy number.

31123443312 is a `hidden beast` number, since 3 + 1 + 1 + 2 + 344 + 3 + 312 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123443313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8311014 + ... + 8314757.

Almost surely, 2^31123443312 is an apocalyptic number.

It is an amenable number.

31123443312 is an abundant number, since it is smaller than the sum of its proper divisors (62679162312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31123443312 is a wasteful number, since it uses less digits than its factorization.

31123443312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16625798 (or 16625789 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 31123443312 its reverse (21334432113), we get a palindrome (52457875425).

The spelling of 31123443312 in words is "thirty-one billion, one hundred twenty-three million, four hundred forty-three thousand, three hundred twelve".