31320313002 has 72 divisors (see below), whose sum is σ = 76606823748. Its totient is φ = 9234466560.

The previous prime is 31320312983. The next prime is 31320313067. The reversal of 31320313002 is 20031302313.

31320313002 is a `hidden beast` number, since 31 + 320 + 313 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30509259561 + 811053441 = 174669^2 + 28479^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 113743 + ... + 274914.

Almost surely, 2^31320313002 is an apocalyptic number.

31320313002 is an abundant number, since it is smaller than the sum of its proper divisors (45286510746).

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

31320313002 is a wasteful number, since it uses less digits than its factorization.

31320313002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388724 (or 388710 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31320313002 its reverse (20031302313), we get a palindrome (51351615315).

The spelling of 31320313002 in words is "thirty-one billion, three hundred twenty million, three hundred thirteen thousand, two".