203223312313 has 20 divisors (see below), whose sum is σ = 251025676020. Its totient is φ = 163944824064.

The previous prime is 203223312269. The next prime is 203223312317. The reversal of 203223312313 is 313213322302.

It can be written as a sum of positive squares in 2 ways, for example, as 136211188624 + 67012123689 = 369068^2 + 258867^2 .

It is not a de Polignac number, because 203223312313 - 2²⁹ = 202686441401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203223312317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2448628 + ... + 2530261.

It is an arithmetic number, because the mean of its divisors is an integer number (12551283801).

Almost surely, 2^203223312313 is an apocalyptic number.

It is an amenable number.

203223312313 is a deficient number, since it is larger than the sum of its proper divisors (47802363707).

203223312313 is an frugal number, since it uses more digits than its factorization.

203223312313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978934 (or 4978913 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 203223312313 its reverse (313213322302), we get a palindrome (516436634615).

The spelling of 203223312313 in words is "two hundred three billion, two hundred twenty-three million, three hundred twelve thousand, three hundred thirteen".