205630163 has 4 divisors (see below), whose sum is σ = 209115480. Its totient is φ = 202144848.

The previous prime is 205630157. The next prime is 205630177. The reversal of 205630163 is 361036502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205630163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205630063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742570 + ... + 1742687.

It is an arithmetic number, because the mean of its divisors is an integer number (52278870).

Almost surely, 2^205630163 is an apocalyptic number.

205630163 is a deficient number, since it is larger than the sum of its proper divisors (3485317).

205630163 is an equidigital number, since it uses as much as digits as its factorization.

205630163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485316.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 205630163 is about 14339.8104241304. The cubic root of 205630163 is about 590.2404104999.

Adding to 205630163 its reverse (361036502), we get a palindrome (566666665).

The spelling of 205630163 in words is "two hundred five million, six hundred thirty thousand, one hundred sixty-three".