205654223 has 2 divisors, whose sum is σ = 205654224. Its totient is φ = 205654222.

The previous prime is 205654199. The next prime is 205654243. The reversal of 205654223 is 322456502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205654223 - 2⁶ = 205654159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205654243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102827111 + 102827112.

It is an arithmetic number, because the mean of its divisors is an integer number (102827112).

Almost surely, 2^205654223 is an apocalyptic number.

205654223 is a deficient number, since it is larger than the sum of its proper divisors (1).

205654223 is an equidigital number, since it uses as much as digits as its factorization.

205654223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 205654223 is about 14340.6493228166. The cubic root of 205654223 is about 590.2634301941.

The spelling of 205654223 in words is "two hundred five million, six hundred fifty-four thousand, two hundred twenty-three".