203031302011313 has 4 divisors (see below), whose sum is σ = 203032205685540. Its totient is φ = 203030398337088.

The previous prime is 203031302011253. The next prime is 203031302011319. The reversal of 203031302011313 is 313110203130302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44119259226289 + 158912042785024 = 6642233^2 + 12606032^2 .

It is a cyclic number.

It is not a de Polignac number, because 203031302011313 - 2⁶ = 203031302011249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203031302011319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451500020 + ... + 451949477.

It is an arithmetic number, because the mean of its divisors is an integer number (50758051421385).

Almost surely, 2^{203031302011313} is an apocalyptic number.

It is an amenable number.

203031302011313 is a deficient number, since it is larger than the sum of its proper divisors (903674227).

203031302011313 is an equidigital number, since it uses as much as digits as its factorization.

203031302011313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903674226.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 203031302011313 its reverse (313110203130302), we get a palindrome (516141505141615).

The spelling of 203031302011313 in words is "two hundred three trillion, thirty-one billion, three hundred two million, eleven thousand, three hundred thirteen".