205223330621 has 8 divisors (see below), whose sum is σ = 211097631360. Its totient is φ = 199411856928.

The previous prime is 205223330603. The next prime is 205223330623. The reversal of 205223330621 is 126033322502.

205223330621 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205223330621 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 (205223330623) by changing a digit.

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, 15700136 + ... + 15713201.

It is an arithmetic number, because the mean of its divisors is an integer number (26387203920).

Almost surely, 2^205223330621 is an apocalyptic number.

It is an amenable number.

205223330621 is a deficient number, since it is larger than the sum of its proper divisors (5874300739).

205223330621 is a wasteful number, since it uses less digits than its factorization.

205223330621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31413523.

The product of its (nonzero) digits is 12960, while the sum is 29.

The spelling of 205223330621 in words is "two hundred five billion, two hundred twenty-three million, three hundred thirty thousand, six hundred twenty-one".