204191 has 8 divisors (see below), whose sum is σ = 223440. Its totient is φ = 185472.

The previous prime is 204173. The next prime is 204233. The reversal of 204191 is 191402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204191 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 (204101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2²⁰⁴¹⁹¹ is an apocalyptic number.

204191 is a deficient number, since it is larger than the sum of its proper divisors (19249).

204191 is a wasteful number, since it uses less digits than its factorization.

204191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 204191 is about 451.8749827109. The cubic root of 204191 is about 58.8860195324.

Adding to 204191 its reverse (191402), we get a palindrome (395593).

The spelling of 204191 in words is "two hundred four thousand, one hundred ninety-one".