203135201 has 4 divisors (see below), whose sum is σ = 203245872. Its totient is φ = 203024532.

The previous prime is 203135173. The next prime is 203135203. The reversal of 203135201 is 102531302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102531302 = 2 ⋅51265651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203135201 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 203135201.

It is not an unprimeable number, because it can be changed into a prime (203135203) 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, 52535 + ... + 56268.

It is an arithmetic number, because the mean of its divisors is an integer number (50811468).

Almost surely, 2^203135201 is an apocalyptic number.

It is an amenable number.

203135201 is a deficient number, since it is larger than the sum of its proper divisors (110671).

203135201 is a wasteful number, since it uses less digits than its factorization.

203135201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110670.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 203135201 is about 14252.5506840004. The cubic root of 203135201 is about 587.8435121614.

Adding to 203135201 its reverse (102531302), we get a palindrome (305666503).

The spelling of 203135201 in words is "two hundred three million, one hundred thirty-five thousand, two hundred one".