205450563 has 4 divisors (see below), whose sum is σ = 273934088. Its totient is φ = 136967040.

The previous prime is 205450519. The next prime is 205450573. The reversal of 205450563 is 365054502.

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

It is not a de Polignac number, because 205450563 - 2¹² = 205446467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205450563.

It is not an unprimeable number, because it can be changed into a prime (205450573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34241758 + ... + 34241763.

It is an arithmetic number, because the mean of its divisors is an integer number (68483522).

Almost surely, 2^205450563 is an apocalyptic number.

205450563 is a deficient number, since it is larger than the sum of its proper divisors (68483525).

205450563 is an equidigital number, since it uses as much as digits as its factorization.

205450563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68483524.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 205450563 is about 14333.5467697287. The cubic root of 205450563 is about 590.0685192854.

The spelling of 205450563 in words is "two hundred five million, four hundred fifty thousand, five hundred sixty-three".