31313022110320 has 80 divisors (see below), whose sum is σ = 77778300263040. Its totient is φ = 11688882999552.

The previous prime is 31313022110291. The next prime is 31313022110347. The reversal of 31313022110320 is 2301122031313.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 31313022110291 and 31313022110300.

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, 153634522 + ... + 153838201.

It is an arithmetic number, because the mean of its divisors is an integer number (972228753288).

Almost surely, 2^{31313022110320} is an apocalyptic number.

It is an amenable number.

31313022110320 is an abundant number, since it is smaller than the sum of its proper divisors (46465278152720).

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

31313022110320 is a wasteful number, since it uses less digits than its factorization.

31313022110320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307472822 (or 307472816 counting only the distinct ones).

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

Adding to 31313022110320 its reverse (2301122031313), we get a palindrome (33614144141633).

The spelling of 31313022110320 in words is "thirty-one trillion, three hundred thirteen billion, twenty-two million, one hundred ten thousand, three hundred twenty".