31013320002 has 96 divisors (see below), whose sum is σ = 73555827840. Its totient is φ = 8689605120.

The previous prime is 31013319977. The next prime is 31013320003. The reversal of 31013320002 is 20002331013.

It is not an unprimeable number, because it can be changed into a prime (31013320003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6435898 + ... + 6440714.

It is an arithmetic number, because the mean of its divisors is an integer number (766206540).

Almost surely, 2^31013320002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013320002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36777913920).

31013320002 is an abundant number, since it is smaller than the sum of its proper divisors (42542507838).

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

31013320002 is a wasteful number, since it uses less digits than its factorization.

31013320002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256 (or 5249 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31013320002 its reverse (20002331013), we get a palindrome (51015651015).

The spelling of 31013320002 in words is "thirty-one billion, thirteen million, three hundred twenty thousand, two".