31115240204 has 12 divisors (see below), whose sum is σ = 54933544344. Its totient is φ = 15419941824.

The previous prime is 31115240197. The next prime is 31115240207. The reversal of 31115240204 is 40204251113.

It is a self number, because there is not a number n which added to its sum of digits gives 31115240204.

It is not an unprimeable number, because it can be changed into a prime (31115240207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34419062 + ... + 34419965.

It is an arithmetic number, because the mean of its divisors is an integer number (4577795362).

Almost surely, 2^31115240204 is an apocalyptic number.

It is an amenable number.

31115240204 is a deficient number, since it is larger than the sum of its proper divisors (23818304140).

31115240204 is a wasteful number, since it uses less digits than its factorization.

31115240204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68839144 (or 68839142 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 31115240204 its reverse (40204251113), we get a palindrome (71319491317).

The spelling of 31115240204 in words is "thirty-one billion, one hundred fifteen million, two hundred forty thousand, two hundred four".