31213030222 has 16 divisors (see below), whose sum is σ = 52162589952. Its totient is φ = 13885873720.

The previous prime is 31213030181. The next prime is 31213030231. The reversal of 31213030222 is 22203031213.

It is a self number, because there is not a number n which added to its sum of digits gives 31213030222.

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, 15092308 + ... + 15094375.

It is an arithmetic number, because the mean of its divisors is an integer number (3260161872).

Almost surely, 2^31213030222 is an apocalyptic number.

31213030222 is a deficient number, since it is larger than the sum of its proper divisors (20949559730).

31213030222 is a wasteful number, since it uses less digits than its factorization.

31213030222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30186743.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31213030222 its reverse (22203031213), we get a palindrome (53416061435).

Subtracting from 31213030222 its reverse (22203031213), we obtain a palindrome (9009999009).

The spelling of 31213030222 in words is "thirty-one billion, two hundred thirteen million, thirty thousand, two hundred twenty-two".