31204333212 has 48 divisors (see below), whose sum is σ = 79890360480. Its totient is φ = 9420173568.

The previous prime is 31204333189. The next prime is 31204333247. The reversal of 31204333212 is 21233340213.

It is a super-2 number, since 2×31204333212² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1878787 + ... + 1895322.

It is an arithmetic number, because the mean of its divisors is an integer number (1664382510).

Almost surely, 2^31204333212 is an apocalyptic number.

It is an amenable number.

31204333212 is an abundant number, since it is smaller than the sum of its proper divisors (48686027268).

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

31204333212 is a wasteful number, since it uses less digits than its factorization.

31204333212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774182 (or 3774180 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31204333212 its reverse (21233340213), we get a palindrome (52437673425).

The spelling of 31204333212 in words is "thirty-one billion, two hundred four million, three hundred thirty-three thousand, two hundred twelve".