31302342012 has 96 divisors (see below), whose sum is σ = 78326740800. Its totient is φ = 9694789632.

The previous prime is 31302342011. The next prime is 31302342013. The reversal of 31302342012 is 21024320313.

It is an interprime number because it is at equal distance from previous prime (31302342011) and next prime (31302342013).

It is a self number, because there is not a number n which added to its sum of digits gives 31302342012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31302342011) 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, 18754314 + ... + 18755982.

It is an arithmetic number, because the mean of its divisors is an integer number (815903550).

Almost surely, 2^31302342012 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 31302342012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39163370400).

31302342012 is an abundant number, since it is smaller than the sum of its proper divisors (47024398788).

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

31302342012 is a wasteful number, since it uses less digits than its factorization.

31302342012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31302342012 its reverse (21024320313), we get a palindrome (52326662325).

The spelling of 31302342012 in words is "thirty-one billion, three hundred two million, three hundred forty-two thousand, twelve".