31313100203 has 32 divisors (see below), whose sum is σ = 39742341120. Its totient is φ = 23963940000.

The previous prime is 31313100193. The next prime is 31313100209. The reversal of 31313100203 is 30200131313.

It is not a de Polignac number, because 31313100203 - 2⁸ = 31313099947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313100209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1148378 + ... + 1175328.

It is an arithmetic number, because the mean of its divisors is an integer number (1241948160).

Almost surely, 2^31313100203 is an apocalyptic number.

31313100203 is a deficient number, since it is larger than the sum of its proper divisors (8429240917).

31313100203 is a wasteful number, since it uses less digits than its factorization.

31313100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27239.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31313100203 its reverse (30200131313), we get a palindrome (61513231516).

The spelling of 31313100203 in words is "thirty-one billion, three hundred thirteen million, one hundred thousand, two hundred three".