31330342212 has 96 divisors (see below), whose sum is σ = 81915079680. Its totient is φ = 9253655040.

The previous prime is 31330342181. The next prime is 31330342217. The reversal of 31330342212 is 21224303313.

It is not an unprimeable number, because it can be changed into a prime (31330342217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 762637 + ... + 802667.

It is an arithmetic number, because the mean of its divisors is an integer number (853282080).

Almost surely, 2^31330342212 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 31330342212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40957539840).

31330342212 is an abundant number, since it is smaller than the sum of its proper divisors (50584737468).

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

31330342212 is a wasteful number, since it uses less digits than its factorization.

31330342212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40253 (or 40251 counting only the distinct ones).

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

Adding to 31330342212 its reverse (21224303313), we get a palindrome (52554645525).

The spelling of 31330342212 in words is "thirty-one billion, three hundred thirty million, three hundred forty-two thousand, two hundred twelve".