31313336203 has 16 divisors (see below), whose sum is σ = 32815648096. Its totient is φ = 29854863360.

The previous prime is 31313336183. The next prime is 31313336221. The reversal of 31313336203 is 30263331313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31313336203 is a prime.

It is a super-2 number, since 2×31313336203² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313336273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253063 + ... + 355903.

It is an arithmetic number, because the mean of its divisors is an integer number (2050978006).

Almost surely, 2^31313336203 is an apocalyptic number.

31313336203 is a deficient number, since it is larger than the sum of its proper divisors (1502311893).

31313336203 is a wasteful number, since it uses less digits than its factorization.

31313336203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103054.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 31313336203 its reverse (30263331313), we get a palindrome (61576667516).

The spelling of 31313336203 in words is "thirty-one billion, three hundred thirteen million, three hundred thirty-six thousand, two hundred three".