230591 has 4 divisors (see below), whose sum is σ = 231672. Its totient is φ = 229512.

The previous prime is 230567. The next prime is 230597. The reversal of 230591 is 195032.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230591 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 230591.

It is not an unprimeable number, because it can be changed into a prime (230597) 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, 101 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (57918).

2²³⁰⁵⁹¹ is an apocalyptic number.

230591 is a deficient number, since it is larger than the sum of its proper divisors (1081).

230591 is an equidigital number, since it uses as much as digits as its factorization.

230591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 230591 is about 480.1989171166. The cubic root of 230591 is about 61.3216903178.

The spelling of 230591 in words is "two hundred thirty thousand, five hundred ninety-one".