204217115405 has 8 divisors (see below), whose sum is σ = 245066565984. Its totient is φ = 163369674000.

The previous prime is 204217115393. The next prime is 204217115411. The reversal of 204217115405 is 504511712402.

204217115405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204217115405 - 2⁶ = 204217115341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268811 + ... + 693320.

It is an arithmetic number, because the mean of its divisors is an integer number (30633320748).

Almost surely, 2^204217115405 is an apocalyptic number.

It is an amenable number.

204217115405 is a deficient number, since it is larger than the sum of its proper divisors (40849450579).

204217115405 is an equidigital number, since it uses as much as digits as its factorization.

204217115405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004587.

The product of its (nonzero) digits is 11200, while the sum is 32.

Adding to 204217115405 its reverse (504511712402), we get a palindrome (708728827807).

The spelling of 204217115405 in words is "two hundred four billion, two hundred seventeen million, one hundred fifteen thousand, four hundred five".