205341391 has 8 divisors (see below), whose sum is σ = 206654400. Its totient is φ = 204032640.

The previous prime is 205341371. The next prime is 205341397. The reversal of 205341391 is 193143502.

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

It is a cyclic number.

It is not a de Polignac number, because 205341391 - 2⁵ = 205341359 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 (205341397) 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, 181315 + ... + 182443.

It is an arithmetic number, because the mean of its divisors is an integer number (25831800).

Almost surely, 2^205341391 is an apocalyptic number.

205341391 is a deficient number, since it is larger than the sum of its proper divisors (1313009).

205341391 is a wasteful number, since it uses less digits than its factorization.

205341391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 205341391 is about 14329.7379948134. The cubic root of 205341391 is about 589.9639842039.

Adding to 205341391 its reverse (193143502), we get a palindrome (398484893).

The spelling of 205341391 in words is "two hundred five million, three hundred forty-one thousand, three hundred ninety-one".