205216563 has 8 divisors (see below), whose sum is σ = 274276800. Its totient is φ = 136483688.

The previous prime is 205216507. The next prime is 205216577. The reversal of 205216563 is 365612502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205216563 - 2¹⁰ = 205215539 is a prime.

It is a super-2 number, since 2×205216563² = 84227675459065938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205216563.

It is not an unprimeable number, because it can be changed into a prime (205616563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80373 + ... + 82886.

It is an arithmetic number, because the mean of its divisors is an integer number (34284600).

Almost surely, 2^205216563 is an apocalyptic number.

205216563 is a deficient number, since it is larger than the sum of its proper divisors (69060237).

205216563 is a wasteful number, since it uses less digits than its factorization.

205216563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163681.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 205216563 is about 14325.3817750174. The cubic root of 205216563 is about 589.8444126751.

The spelling of 205216563 in words is "two hundred five million, two hundred sixteen thousand, five hundred sixty-three".