131231313222 has 16 divisors (see below), whose sum is σ = 262888018992. Its totient is φ = 43672872320.

The previous prime is 131231313181. The next prime is 131231313319. The reversal of 131231313222 is 222313132131.

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 = 131231313192 and 131231313201.

It is a congruent number.

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, 17720679 + ... + 17728082.

It is an arithmetic number, because the mean of its divisors is an integer number (16430501187).

Almost surely, 2^131231313222 is an apocalyptic number.

131231313222 is an abundant number, since it is smaller than the sum of its proper divisors (131656705770).

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

131231313222 is a wasteful number, since it uses less digits than its factorization.

131231313222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35449383.

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

Adding to 131231313222 its reverse (222313132131), we get a palindrome (353544445353).

The spelling of 131231313222 in words is "one hundred thirty-one billion, two hundred thirty-one million, three hundred thirteen thousand, two hundred twenty-two".