205199 has 4 divisors (see below), whose sum is σ = 206664. Its totient is φ = 203736.

The previous prime is 205187. The next prime is 205201. The reversal of 205199 is 991502.

It is a happy number.

205199 is nontrivially palindromic in base 7 and base 13.

205199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991502 = 2 ⋅495751.

It is a cyclic number.

It is not a de Polignac number, because 205199 - 2¹⁶ = 139663 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 (205129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497 + ... + 810.

It is an arithmetic number, because the mean of its divisors is an integer number (51666).

2²⁰⁵¹⁹⁹ is an apocalyptic number.

205199 is a deficient number, since it is larger than the sum of its proper divisors (1465).

205199 is a wasteful number, since it uses less digits than its factorization.

205199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 205199 is about 452.9889623379. The cubic root of 205199 is about 58.9827585357.

It can be divided in two parts, 205 and 199, that added together give a palindrome (404).

The spelling of 205199 in words is "two hundred five thousand, one hundred ninety-nine".