205110023213 has 8 divisors (see below), whose sum is σ = 211522865400. Its totient is φ = 198764331520.

The previous prime is 205110023203. The next prime is 205110023221. The reversal of 205110023213 is 312320011502.

It can be written as a sum of positive squares in 4 ways, for example, as 7985567044 + 197124456169 = 89362^2 + 443987^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 205110023213 - 2⁶ = 205110023149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205110023203) 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 7 ways as a sum of consecutive naturals, for example, 16781420 + ... + 16793637.

It is an arithmetic number, because the mean of its divisors is an integer number (26440358175).

Almost surely, 2^205110023213 is an apocalyptic number.

It is an amenable number.

205110023213 is a deficient number, since it is larger than the sum of its proper divisors (6412842187).

205110023213 is a wasteful number, since it uses less digits than its factorization.

205110023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33575247.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 205110023213 its reverse (312320011502), we get a palindrome (517430034715).

The spelling of 205110023213 in words is "two hundred five billion, one hundred ten million, twenty-three thousand, two hundred thirteen".