31313301232 has 80 divisors (see below), whose sum is σ = 66582077760. Its totient is φ = 14200008704.

The previous prime is 31313301211. The next prime is 31313301241. The reversal of 31313301232 is 23210331313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4390053 + ... + 4397179.

It is an arithmetic number, because the mean of its divisors is an integer number (832275972).

Almost surely, 2^31313301232 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 31313301232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33291038880).

31313301232 is an abundant number, since it is smaller than the sum of its proper divisors (35268776528).

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

31313301232 is a wasteful number, since it uses less digits than its factorization.

31313301232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7738 (or 7732 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31313301232 its reverse (23210331313), we get a palindrome (54523632545).

The spelling of 31313301232 in words is "thirty-one billion, three hundred thirteen million, three hundred one thousand, two hundred thirty-two".