313131221322 has 32 divisors (see below), whose sum is σ = 633226999680. Its totient is φ = 103218811200.

The previous prime is 313131221269. The next prime is 313131221323. The reversal of 313131221322 is 223122131313.

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

It is a junction number, because it is equal to n+sod(n) for n = 313131221292 and 313131221301.

It is not an unprimeable number, because it can be changed into a prime (313131221323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190723 + ... + 814025.

It is an arithmetic number, because the mean of its divisors is an integer number (19788343740).

Almost surely, 2^313131221322 is an apocalyptic number.

313131221322 is an abundant number, since it is smaller than the sum of its proper divisors (320095778358).

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

313131221322 is a wasteful number, since it uses less digits than its factorization.

313131221322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624238.

The product of its digits is 1296, while the sum is 24.

Adding to 313131221322 its reverse (223122131313), we get a palindrome (536253352635).

Subtracting from 313131221322 its reverse (223122131313), we obtain a palindrome (90009090009).

The spelling of 313131221322 in words is "three hundred thirteen billion, one hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-two".