205132191 has 16 divisors (see below), whose sum is σ = 298616448. Its totient is φ = 124221600.

The previous prime is 205132159. The next prime is 205132201. The reversal of 205132191 is 191231502.

205132191 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 205132191 - 2⁵ = 205132159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205132391) 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, 68865 + ... + 71781.

It is an arithmetic number, because the mean of its divisors is an integer number (18663528).

Almost surely, 2^205132191 is an apocalyptic number.

205132191 is a deficient number, since it is larger than the sum of its proper divisors (93484257).

205132191 is a wasteful number, since it uses less digits than its factorization.

205132191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 205132191 is about 14322.4366292890. The cubic root of 205132191 is about 589.7635660906.

Adding to 205132191 its reverse (191231502), we get a palindrome (396363693).

The spelling of 205132191 in words is "two hundred five million, one hundred thirty-two thousand, one hundred ninety-one".