204140523 has 4 divisors (see below), whose sum is σ = 272187368. Its totient is φ = 136093680.

The previous prime is 204140513. The next prime is 204140527. The reversal of 204140523 is 325041402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204140523 - 2⁹ = 204140011 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 204140523.

It is not an unprimeable number, because it can be changed into a prime (204140527) 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, 34023418 + ... + 34023423.

It is an arithmetic number, because the mean of its divisors is an integer number (68046842).

Almost surely, 2^204140523 is an apocalyptic number.

204140523 is a deficient number, since it is larger than the sum of its proper divisors (68046845).

204140523 is an equidigital number, since it uses as much as digits as its factorization.

204140523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68046844.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 204140523 is about 14287.7752991850. The cubic root of 204140523 is about 588.8116682984.

Adding to 204140523 its reverse (325041402), we get a palindrome (529181925).

The spelling of 204140523 in words is "two hundred four million, one hundred forty thousand, five hundred twenty-three".