31204343412 has 72 divisors (see below), whose sum is σ = 86160503520. Its totient is φ = 9443536320.

The previous prime is 31204343411. The next prime is 31204343419. The reversal of 31204343412 is 21434340213.

31204343412 is a `hidden beast` number, since 3 + 1 + 204 + 3 + 43 + 412 = 666.

It is a super-2 number, since 2×31204343412² (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 (31204343411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255139 + ... + 357077.

It is an arithmetic number, because the mean of its divisors is an integer number (1196673660).

Almost surely, 2^31204343412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31204343412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43080251760).

31204343412 is an abundant number, since it is smaller than the sum of its proper divisors (54956160108).

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

31204343412 is a wasteful number, since it uses less digits than its factorization.

31204343412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102733 (or 102728 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 31204343412 its reverse (21434340213), we get a palindrome (52638683625).

The spelling of 31204343412 in words is "thirty-one billion, two hundred four million, three hundred forty-three thousand, four hundred twelve".