204538523 has 4 divisors (see below), whose sum is σ = 233758320. Its totient is φ = 175318728.

The previous prime is 204538511. The next prime is 204538531. The reversal of 204538523 is 325835402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325835402 = 2 ⋅162917701.

It is a cyclic number.

It is not a de Polignac number, because 204538523 - 2⁶ = 204538459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204538523.

It is not an unprimeable number, because it can be changed into a prime (204538223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14609888 + ... + 14609901.

It is an arithmetic number, because the mean of its divisors is an integer number (58439580).

Almost surely, 2^204538523 is an apocalyptic number.

204538523 is a deficient number, since it is larger than the sum of its proper divisors (29219797).

204538523 is an equidigital number, since it uses as much as digits as its factorization.

204538523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29219796.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 204538523 is about 14301.6965077574. The cubic root of 204538523 is about 589.1940763051.

The spelling of 204538523 in words is "two hundred four million, five hundred thirty-eight thousand, five hundred twenty-three".