203401133 has 6 divisors (see below), whose sum is σ = 220251114. Its totient is φ = 187754736.

The previous prime is 203401097. The next prime is 203401139. The reversal of 203401133 is 331104302.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 708964 + 202692169 = 842^2 + 14237^2 .

It is a de Polignac number, because none of the positive numbers 2^k-203401133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203401139) 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 5 ways as a sum of consecutive naturals, for example, 601610 + ... + 601947.

It is an arithmetic number, because the mean of its divisors is an integer number (36708519).

Almost surely, 2^203401133 is an apocalyptic number.

It is an amenable number.

203401133 is a deficient number, since it is larger than the sum of its proper divisors (16849981).

203401133 is a wasteful number, since it uses less digits than its factorization.

203401133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203583 (or 1203570 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 203401133 is about 14261.8769101405. The cubic root of 203401133 is about 588.0999230511.

Adding to 203401133 its reverse (331104302), we get a palindrome (534505435).

The spelling of 203401133 in words is "two hundred three million, four hundred one thousand, one hundred thirty-three".