203113321313 has 16 divisors (see below), whose sum is σ = 239683666944. Its totient is φ = 168434614080.

The previous prime is 203113321291. The next prime is 203113321331. The reversal of 203113321313 is 313123311302.

It is a cyclic number.

It is not a de Polignac number, because 203113321313 - 2⁶ = 203113321249 is a prime.

It is a super-3 number, since 3×203113321313³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203113321013) 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, 670631 + ... + 925187.

It is an arithmetic number, because the mean of its divisors is an integer number (14980229184).

Almost surely, 2^203113321313 is an apocalyptic number.

It is an amenable number.

203113321313 is a deficient number, since it is larger than the sum of its proper divisors (36570345631).

203113321313 is a wasteful number, since it uses less digits than its factorization.

203113321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258272.

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

Adding to 203113321313 its reverse (313123311302), we get a palindrome (516236632615).

The spelling of 203113321313 in words is "two hundred three billion, one hundred thirteen million, three hundred twenty-one thousand, three hundred thirteen".