203071 has 4 divisors (see below), whose sum is σ = 221544. Its totient is φ = 184600.

The previous prime is 203057. The next prime is 203117. The reversal of 203071 is 170302.

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 203071 - 2⁵ = 203039 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 (203011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9220 + ... + 9241.

It is an arithmetic number, because the mean of its divisors is an integer number (55386).

2²⁰³⁰⁷¹ is an apocalyptic number.

203071 is a deficient number, since it is larger than the sum of its proper divisors (18473).

203071 is a wasteful number, since it uses less digits than its factorization.

203071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18472.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 203071 is about 450.6339978297. The cubic root of 203071 is about 58.7781576207.

Adding to 203071 its reverse (170302), we get a palindrome (373373).

The spelling of 203071 in words is "two hundred three thousand, seventy-one", and thus it is an iban number.