205022565 has 48 divisors (see below), whose sum is σ = 389525760. Its totient is φ = 98931840.

The previous prime is 205022537. The next prime is 205022599. The reversal of 205022565 is 565220502.

It is not a de Polignac number, because 205022565 - 2⁹ = 205022053 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 117439 + ... + 119171.

It is an arithmetic number, because the mean of its divisors is an integer number (8115120).

Almost surely, 2^205022565 is an apocalyptic number.

It is an amenable number.

205022565 is a deficient number, since it is larger than the sum of its proper divisors (184503195).

205022565 is a wasteful number, since it uses less digits than its factorization.

205022565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 205022565 is about 14318.6090455742. The cubic root of 205022565 is about 589.6584876027.

The spelling of 205022565 in words is "two hundred five million, twenty-two thousand, five hundred sixty-five".