204344435217 has 16 divisors (see below), whose sum is σ = 293435146368. Its totient is φ = 125742923520.

The previous prime is 204344435179. The next prime is 204344435303. The reversal of 204344435217 is 712534443402.

It is not a de Polignac number, because 204344435217 - 2⁸ = 204344434961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (204344435917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546217 + ... + 840857.

It is an arithmetic number, because the mean of its divisors is an integer number (18339696648).

Almost surely, 2^204344435217 is an apocalyptic number.

It is an amenable number.

204344435217 is a deficient number, since it is larger than the sum of its proper divisors (89090711151).

204344435217 is a wasteful number, since it uses less digits than its factorization.

204344435217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312440.

The product of its (nonzero) digits is 322560, while the sum is 39.

Adding to 204344435217 its reverse (712534443402), we get a palindrome (916878878619).

The spelling of 204344435217 in words is "two hundred four billion, three hundred forty-four million, four hundred thirty-five thousand, two hundred seventeen".