31323214212 has 24 divisors (see below), whose sum is σ = 73415252736. Its totient is φ = 10394249568.

The previous prime is 31323214211. The next prime is 31323214253. The reversal of 31323214212 is 21241232313.

It is a super-2 number, since 2×31323214212² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (31323214211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5849943 + ... + 5855294.

It is an arithmetic number, because the mean of its divisors is an integer number (3058968864).

Almost surely, 2^31323214212 is an apocalyptic number.

It is an amenable number.

31323214212 is an abundant number, since it is smaller than the sum of its proper divisors (42092038524).

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

31323214212 is a wasteful number, since it uses less digits than its factorization.

31323214212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11705467 (or 11705465 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 31323214212 its reverse (21241232313), we get a palindrome (52564446525).

The spelling of 31323214212 in words is "thirty-one billion, three hundred twenty-three million, two hundred fourteen thousand, two hundred twelve".