203402243 has 16 divisors (see below), whose sum is σ = 226672992. Its totient is φ = 180960000.

The previous prime is 203402233. The next prime is 203402249. The reversal of 203402243 is 342204302.

It is a cyclic number.

It is not a de Polignac number, because 203402243 - 2¹⁴ = 203385859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203402249) 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 15 ways as a sum of consecutive naturals, for example, 155693 + ... + 156993.

It is an arithmetic number, because the mean of its divisors is an integer number (14167062).

Almost surely, 2^203402243 is an apocalyptic number.

203402243 is a deficient number, since it is larger than the sum of its proper divisors (23270749).

203402243 is a wasteful number, since it uses less digits than its factorization.

203402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 203402243 is about 14261.9158250215. The cubic root of 203402243 is about 588.1009928415.

Adding to 203402243 its reverse (342204302), we get a palindrome (545606545).

The spelling of 203402243 in words is "two hundred three million, four hundred two thousand, two hundred forty-three".