203113103 has 4 divisors (see below), whose sum is σ = 206442888. Its totient is φ = 199783320.

The previous prime is 203113087. The next prime is 203113109. The reversal of 203113103 is 301311302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301311302 = 2 ⋅150655651.

It is a cyclic number.

It is not a de Polignac number, because 203113103 - 2⁴ = 203113087 is a prime.

It is a super-2 number, since 2×203113103² = 82509865220577218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203113109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664801 + ... + 1664922.

It is an arithmetic number, because the mean of its divisors is an integer number (51610722).

Almost surely, 2^203113103 is an apocalyptic number.

203113103 is a deficient number, since it is larger than the sum of its proper divisors (3329785).

203113103 is an equidigital number, since it uses as much as digits as its factorization.

203113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329784.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 203113103 is about 14251.7754332574. The cubic root of 203113103 is about 587.8221952635.

Adding to 203113103 its reverse (301311302), we get a palindrome (504424405).

The spelling of 203113103 in words is "two hundred three million, one hundred thirteen thousand, one hundred three".