31323033212 has 12 divisors (see below), whose sum is σ = 55744381560. Its totient is φ = 15396067056.

The previous prime is 31323033149. The next prime is 31323033229. The reversal of 31323033212 is 21233032313.

It is a super-2 number, since 2×31323033212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66362123 + ... + 66362594.

It is an arithmetic number, because the mean of its divisors is an integer number (4645365130).

Almost surely, 2^31323033212 is an apocalyptic number.

It is an amenable number.

31323033212 is a deficient number, since it is larger than the sum of its proper divisors (24421348348).

31323033212 is a wasteful number, since it uses less digits than its factorization.

31323033212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132724780 (or 132724778 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31323033212 its reverse (21233032313), we get a palindrome (52556065525).

The spelling of 31323033212 in words is "thirty-one billion, three hundred twenty-three million, thirty-three thousand, two hundred twelve".