204204043 has 4 divisors (see below), whose sum is σ = 206112600. Its totient is φ = 202295488.

The previous prime is 204204031. The next prime is 204204059. The reversal of 204204043 is 340402402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340402402 = 2 ⋅170201201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204204043 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 204204043.

It is not an unprimeable number, because it can be changed into a prime (204201043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954118 + ... + 954331.

It is an arithmetic number, because the mean of its divisors is an integer number (51528150).

Almost surely, 2^204204043 is an apocalyptic number.

204204043 is a deficient number, since it is larger than the sum of its proper divisors (1908557).

204204043 is a wasteful number, since it uses less digits than its factorization.

204204043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908556.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 204204043 is about 14289.9980055982. The cubic root of 204204043 is about 588.8727331604.

Adding to 204204043 its reverse (340402402), we get a palindrome (544606445).

The spelling of 204204043 in words is "two hundred four million, two hundred four thousand, forty-three".