203103313013 has 4 divisors (see below), whose sum is σ = 203107300800. Its totient is φ = 203099325228.

The previous prime is 203103312983. The next prime is 203103313031. The reversal of 203103313013 is 310313301302.

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 203103313013 - 2⁶ = 203103312949 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 (203103313043) 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, 1916495 + ... + 2019692.

It is an arithmetic number, because the mean of its divisors is an integer number (50776825200).

Almost surely, 2^203103313013 is an apocalyptic number.

It is an amenable number.

203103313013 is a deficient number, since it is larger than the sum of its proper divisors (3987787).

203103313013 is an equidigital number, since it uses as much as digits as its factorization.

203103313013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987786.

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

Adding to 203103313013 its reverse (310313301302), we get a palindrome (513416614315).

The spelling of 203103313013 in words is "two hundred three billion, one hundred three million, three hundred thirteen thousand, thirteen".