203131000312 has 8 divisors (see below), whose sum is σ = 380870625600. Its totient is φ = 101565500152.

The previous prime is 203131000309. The next prime is 203131000321. The reversal of 203131000312 is 213000131302.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695687512 + ... + 12695687527.

It is an arithmetic number, because the mean of its divisors is an integer number (47608828200).

Almost surely, 2^203131000312 is an apocalyptic number.

It is an amenable number.

203131000312 is a deficient number, since it is larger than the sum of its proper divisors (177739625288).

203131000312 is a wasteful number, since it uses less digits than its factorization.

203131000312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25391375045 (or 25391375041 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 203131000312 its reverse (213000131302), we get a palindrome (416131131614).

The spelling of 203131000312 in words is "two hundred three billion, one hundred thirty-one million, three hundred twelve", and thus it is an aban number.