31313232132 has 192 divisors, whose sum is σ = 91764879360. Its totient is φ = 8090482176.

The previous prime is 31313232121. The next prime is 31313232151. The reversal of 31313232132 is 23123231313.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24030993 + ... + 24032295.

It is an arithmetic number, because the mean of its divisors is an integer number (477942080).

Almost surely, 2^31313232132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31313232132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45882439680).

31313232132 is an abundant number, since it is smaller than the sum of its proper divisors (60451647228).

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

31313232132 is a wasteful number, since it uses less digits than its factorization.

31313232132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1760 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 31313232132 its reverse (23123231313), we get a palindrome (54436463445).

The spelling of 31313232132 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty-two thousand, one hundred thirty-two".