31130231222 has 24 divisors (see below), whose sum is σ = 49165261320. Its totient is φ = 14781191040.

The previous prime is 31130231213. The next prime is 31130231233. The reversal of 31130231222 is 22213203113.

It is a super-2 number, since 2×31130231222² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31130231194 and 31130231203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41222 + ... + 252902.

It is an arithmetic number, because the mean of its divisors is an integer number (2048552555).

Almost surely, 2^31130231222 is an apocalyptic number.

31130231222 is a deficient number, since it is larger than the sum of its proper divisors (18035030098).

31130231222 is a wasteful number, since it uses less digits than its factorization.

31130231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211868 (or 211845 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31130231222 its reverse (22213203113), we get a palindrome (53343434335).

The spelling of 31130231222 in words is "thirty-one billion, one hundred thirty million, two hundred thirty-one thousand, two hundred twenty-two".