203091 has 16 divisors (see below), whose sum is σ = 326400. Its totient is φ = 109728.

The previous prime is 203057. The next prime is 203117. The reversal of 203091 is 190302.

203091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203091 - 2¹⁰ = 202067 is a prime.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 203091.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 203091.

It is not an unprimeable number, because it can be changed into a prime (203011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (20400).

2²⁰³⁰⁹¹ is an apocalyptic number.

203091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

203091 is a deficient number, since it is larger than the sum of its proper divisors (123309).

203091 is a wasteful number, since it uses less digits than its factorization.

203091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 203091 is about 450.6561882411. The cubic root of 203091 is about 58.7800871996.

Adding to 203091 its reverse (190302), we get a palindrome (393393).

The spelling of 203091 in words is "two hundred three thousand, ninety-one".