204315213261 has 16 divisors (see below), whose sum is σ = 281326942208. Its totient is φ = 131760529200.

The previous prime is 204315213251. The next prime is 204315213283. The reversal of 204315213261 is 162312513402.

It is not a de Polignac number, because 204315213261 - 2⁵ = 204315213229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204315213251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242791 + ... + 683796.

It is an arithmetic number, because the mean of its divisors is an integer number (17582933888).

Almost surely, 2^204315213261 is an apocalyptic number.

It is an amenable number.

204315213261 is a deficient number, since it is larger than the sum of its proper divisors (77011728947).

204315213261 is a wasteful number, since it uses less digits than its factorization.

204315213261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928992.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 204315213261 its reverse (162312513402), we get a palindrome (366627726663).

The spelling of 204315213261 in words is "two hundred four billion, three hundred fifteen million, two hundred thirteen thousand, two hundred sixty-one".