31340444212 has 48 divisors (see below), whose sum is σ = 68496035328. Its totient is φ = 12189690720.

The previous prime is 31340444189. The next prime is 31340444243. The reversal of 31340444212 is 21244404313.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94123 + ... + 267469.

It is an arithmetic number, because the mean of its divisors is an integer number (1427000736).

Almost surely, 2^31340444212 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 31340444212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34248017664).

31340444212 is an abundant number, since it is smaller than the sum of its proper divisors (37155591116).

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

31340444212 is a wasteful number, since it uses less digits than its factorization.

31340444212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173956 (or 173954 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31340444212 its reverse (21244404313), we get a palindrome (52584848525).

The spelling of 31340444212 in words is "thirty-one billion, three hundred forty million, four hundred forty-four thousand, two hundred twelve".