31313232112 has 20 divisors (see below), whose sum is σ = 63862513480. Its totient is φ = 14832583488.

The previous prime is 31313232109. The next prime is 31313232113. The reversal of 31313232112 is 21123231313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313232113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51501723 + ... + 51502330.

It is an arithmetic number, because the mean of its divisors is an integer number (3193125674).

Almost surely, 2^31313232112 is an apocalyptic number.

It is an amenable number.

31313232112 is an abundant number, since it is smaller than the sum of its proper divisors (32549281368).

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

31313232112 is a wasteful number, since it uses less digits than its factorization.

31313232112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103004080 (or 103004074 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 31313232112 its reverse (21123231313), we get a palindrome (52436463425).

The spelling of 31313232112 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty-two thousand, one hundred twelve".