205664227 has 12 divisors (see below), whose sum is σ = 222123000. Its totient is φ = 190294272.

The previous prime is 205664177. The next prime is 205664233. The reversal of 205664227 is 722466502.

205664227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205664227 - 2⁷ = 205664099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205664192 and 205664201.

It is not an unprimeable number, because it can be changed into a prime (205664237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8899 + ... + 22147.

It is an arithmetic number, because the mean of its divisors is an integer number (18510250).

Almost surely, 2^205664227 is an apocalyptic number.

205664227 is a deficient number, since it is larger than the sum of its proper divisors (16458773).

205664227 is a wasteful number, since it uses less digits than its factorization.

205664227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13330 (or 13311 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 205664227 is about 14340.9981172860. The cubic root of 205664227 is about 590.2730011129.

The spelling of 205664227 in words is "two hundred five million, six hundred sixty-four thousand, two hundred twenty-seven".