205116523 has 4 divisors (see below), whose sum is σ = 205145280. Its totient is φ = 205087768.

The previous prime is 205116521. The next prime is 205116551. The reversal of 205116523 is 325611502.

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 not a de Polignac number, because 205116523 - 2¹ = 205116521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205116521) 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, 5286 + ... + 20932.

It is an arithmetic number, because the mean of its divisors is an integer number (51286320).

Almost surely, 2^205116523 is an apocalyptic number.

205116523 is a deficient number, since it is larger than the sum of its proper divisors (28757).

205116523 is a wasteful number, since it uses less digits than its factorization.

205116523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28756.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 205116523 is about 14321.8896448758. The cubic root of 205116523 is about 589.7485503248.

The spelling of 205116523 in words is "two hundred five million, one hundred sixteen thousand, five hundred twenty-three".