203310331013 has 4 divisors (see below), whose sum is σ = 203418534240. Its totient is φ = 203202127788.

The previous prime is 203310331009. The next prime is 203310331039. The reversal of 203310331013 is 310133013302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203310331013 - 2² = 203310331009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203310331043) 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, 54098795 + ... + 54102552.

It is an arithmetic number, because the mean of its divisors is an integer number (50854633560).

Almost surely, 2^203310331013 is an apocalyptic number.

It is an amenable number.

203310331013 is a deficient number, since it is larger than the sum of its proper divisors (108203227).

203310331013 is a wasteful number, since it uses less digits than its factorization.

203310331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108203226.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 203310331013 its reverse (310133013302), we get a palindrome (513443344315).

The spelling of 203310331013 in words is "two hundred three billion, three hundred ten million, three hundred thirty-one thousand, thirteen".