205230643 has 2 divisors, whose sum is σ = 205230644. Its totient is φ = 205230642.

The previous prime is 205230611. The next prime is 205230653. The reversal of 205230643 is 346032502.

It is a happy number.

205230643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205230643 - 2⁵ = 205230611 is a prime.

It is equal to p_11352454 and since 205230643 and 11352454 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (205230653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102615321 + 102615322.

It is an arithmetic number, because the mean of its divisors is an integer number (102615322).

Almost surely, 2^205230643 is an apocalyptic number.

205230643 is a deficient number, since it is larger than the sum of its proper divisors (1).

205230643 is an equidigital number, since it uses as much as digits as its factorization.

205230643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 205230643 is about 14325.8732020076. The cubic root of 205230643 is about 589.8579021961.

The spelling of 205230643 in words is "two hundred five million, two hundred thirty thousand, six hundred forty-three".