203112223 has 4 divisors (see below), whose sum is σ = 213802360. Its totient is φ = 192422088.

The previous prime is 203112197. The next prime is 203112229. The reversal of 203112223 is 322211302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203112223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203112197 and 203112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203112229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5345040 + ... + 5345077.

It is an arithmetic number, because the mean of its divisors is an integer number (53450590).

Almost surely, 2^203112223 is an apocalyptic number.

203112223 is a deficient number, since it is larger than the sum of its proper divisors (10690137).

203112223 is a wasteful number, since it uses less digits than its factorization.

203112223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10690136.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 203112223 is about 14251.7445598776. The cubic root of 203112223 is about 587.8213463371.

Adding to 203112223 its reverse (322211302), we get a palindrome (525323525).

The spelling of 203112223 in words is "two hundred three million, one hundred twelve thousand, two hundred twenty-three".