31302113312 has 48 divisors (see below), whose sum is σ = 65041149600. Its totient is φ = 14788085760.

The previous prime is 31302113231. The next prime is 31302113377. The reversal of 31302113312 is 21331120313.

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, 162512 + ... + 298352.

It is an arithmetic number, because the mean of its divisors is an integer number (1355023950).

Almost surely, 2^31302113312 is an apocalyptic number.

31302113312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31302113312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32520574800).

31302113312 is an abundant number, since it is smaller than the sum of its proper divisors (33739036288).

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

31302113312 is a wasteful number, since it uses less digits than its factorization.

31302113312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136249 (or 136241 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31302113312 its reverse (21331120313), we get a palindrome (52633233625).

The spelling of 31302113312 in words is "thirty-one billion, three hundred two million, one hundred thirteen thousand, three hundred twelve".