312131300403 has 16 divisors (see below), whose sum is σ = 450440748800. Its totient is φ = 191115565344.

The previous prime is 312131300389. The next prime is 312131300419. The reversal of 312131300403 is 304003131213.

It is not a de Polignac number, because 312131300403 - 2⁴ = 312131300387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312131300403.

It is not an unprimeable number, because it can be changed into a prime (312131300443) 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 15 ways as a sum of consecutive naturals, for example, 20101201 + ... + 20116722.

It is an arithmetic number, because the mean of its divisors is an integer number (28152546800).

Almost surely, 2^312131300403 is an apocalyptic number.

312131300403 is a deficient number, since it is larger than the sum of its proper divisors (138309448397).

312131300403 is a wasteful number, since it uses less digits than its factorization.

312131300403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40218138.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 312131300403 its reverse (304003131213), we get a palindrome (616134431616).

The spelling of 312131300403 in words is "three hundred twelve billion, one hundred thirty-one million, three hundred thousand, four hundred three".