203131313313 has 16 divisors (see below), whose sum is σ = 286194923520. Its totient is φ = 127893349584.

The previous prime is 203131313299. The next prime is 203131313321. The reversal of 203131313313 is 313313131302.

It is not a de Polignac number, because 203131313313 - 2⁶ = 203131313249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203131313353) 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, 18627031 + ... + 18637932.

It is an arithmetic number, because the mean of its divisors is an integer number (17887182720).

Almost surely, 2^203131313313 is an apocalyptic number.

203131313313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

203131313313 is a deficient number, since it is larger than the sum of its proper divisors (83063610207).

203131313313 is a wasteful number, since it uses less digits than its factorization.

203131313313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37265068.

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 203131313313 its reverse (313313131302), we get a palindrome (516444444615).

The spelling of 203131313313 in words is "two hundred three billion, one hundred thirty-one million, three hundred thirteen thousand, three hundred thirteen".