205464563 has 4 divisors (see below), whose sum is σ = 206001408. Its totient is φ = 204927720.

The previous prime is 205464547. The next prime is 205464569. The reversal of 205464563 is 365464502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 205464563 - 2⁴ = 205464547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205464569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267848 + ... + 268613.

It is an arithmetic number, because the mean of its divisors is an integer number (51500352).

Almost surely, 2^205464563 is an apocalyptic number.

205464563 is a deficient number, since it is larger than the sum of its proper divisors (536845).

205464563 is an equidigital number, since it uses as much as digits as its factorization.

205464563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536844.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 205464563 is about 14334.0351262302. The cubic root of 205464563 is about 590.0819219770.

The spelling of 205464563 in words is "two hundred five million, four hundred sixty-four thousand, five hundred sixty-three".