31130232222 has 16 divisors (see below), whose sum is σ = 62291204352. Its totient is φ = 10371620760.

The previous prime is 31130232191. The next prime is 31130232223. The reversal of 31130232222 is 22223203113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130232223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267654 + ... + 1291977.

It is an arithmetic number, because the mean of its divisors is an integer number (3893200272).

Almost surely, 2^31130232222 is an apocalyptic number.

31130232222 is an abundant number, since it is smaller than the sum of its proper divisors (31160972130).

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

31130232222 is a wasteful number, since it uses less digits than its factorization.

31130232222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561663.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31130232222 its reverse (22223203113), we get a palindrome (53353435335).

The spelling of 31130232222 in words is "thirty-one billion, one hundred thirty million, two hundred thirty-two thousand, two hundred twenty-two".