31321423222 has 24 divisors (see below), whose sum is σ = 47384202600. Its totient is φ = 15527754528.

The previous prime is 31321423163. The next prime is 31321423229. The reversal of 31321423222 is 22232412313.

It is a super-2 number, since 2×31321423222² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321423229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36462229 + ... + 36463087.

It is an arithmetic number, because the mean of its divisors is an integer number (1974341775).

Almost surely, 2^31321423222 is an apocalyptic number.

31321423222 is a deficient number, since it is larger than the sum of its proper divisors (16062779378).

31321423222 is an equidigital number, since it uses as much as digits as its factorization.

31321423222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788 (or 1609 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

Adding to 31321423222 its reverse (22232412313), we get a palindrome (53553835535).

The spelling of 31321423222 in words is "thirty-one billion, three hundred twenty-one million, four hundred twenty-three thousand, two hundred twenty-two".