31312212222 has 64 divisors (see below), whose sum is σ = 67302273024. Its totient is φ = 9692939520.

The previous prime is 31312212209. The next prime is 31312212233. The reversal of 31312212222 is 22221221313.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471223 + ... + 533549.

It is an arithmetic number, because the mean of its divisors is an integer number (1051598016).

Almost surely, 2^31312212222 is an apocalyptic number.

31312212222 is an abundant number, since it is smaller than the sum of its proper divisors (35990060802).

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

31312212222 is a wasteful number, since it uses less digits than its factorization.

31312212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62473.

The product of its digits is 576, while the sum is 21.

Adding to 31312212222 its reverse (22221221313), we get a palindrome (53533433535).

Subtracting from 31312212222 its reverse (22221221313), we obtain a palindrome (9090990909).

The spelling of 31312212222 in words is "thirty-one billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty-two".