203421223 has 4 divisors (see below), whose sum is σ = 212265648. Its totient is φ = 194576800.

The previous prime is 203421221. The next prime is 203421233. The reversal of 203421223 is 322124302.

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

It is a cyclic number.

It is not a de Polignac number, because 203421223 - 2¹ = 203421221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203421223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203421221) 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, 4422178 + ... + 4422223.

It is an arithmetic number, because the mean of its divisors is an integer number (53066412).

Almost surely, 2^203421223 is an apocalyptic number.

203421223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

203421223 is a deficient number, since it is larger than the sum of its proper divisors (8844425).

203421223 is an equidigital number, since it uses as much as digits as its factorization.

203421223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844424.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 203421223 is about 14262.5812179984. The cubic root of 203421223 is about 588.1192846910.

Adding to 203421223 its reverse (322124302), we get a palindrome (525545525).

It can be divided in two parts, 20 and 3421223, that added together give a palindrome (3421243).

The spelling of 203421223 in words is "two hundred three million, four hundred twenty-one thousand, two hundred twenty-three".