204240345 has 32 divisors (see below), whose sum is σ = 343526400. Its totient is φ = 103418304.

The previous prime is 204240319. The next prime is 204240353. The reversal of 204240345 is 543042402.

It is not a de Polignac number, because 204240345 - 2⁸ = 204240089 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45826 + ... + 50084.

It is an arithmetic number, because the mean of its divisors is an integer number (10735200).

Almost surely, 2^204240345 is an apocalyptic number.

It is an amenable number.

204240345 is a deficient number, since it is larger than the sum of its proper divisors (139286055).

204240345 is a wasteful number, since it uses less digits than its factorization.

204240345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 204240345 is about 14291.2681382724. The cubic root of 204240345 is about 588.9076263503.

Adding to 204240345 its reverse (543042402), we get a palindrome (747282747).

The spelling of 204240345 in words is "two hundred four million, two hundred forty thousand, three hundred forty-five".