205270565 has 8 divisors (see below), whose sum is σ = 247615488. Its totient is φ = 163355920.

The previous prime is 205270553. The next prime is 205270567. The reversal of 205270565 is 565072502.

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

It is not a de Polignac number, because 205270565 - 2⁶ = 205270501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205270567) 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 7 ways as a sum of consecutive naturals, for example, 106517 + ... + 108426.

It is an arithmetic number, because the mean of its divisors is an integer number (30951936).

Almost surely, 2^205270565 is an apocalyptic number.

It is an amenable number.

205270565 is a deficient number, since it is larger than the sum of its proper divisors (42344923).

205270565 is a wasteful number, since it uses less digits than its factorization.

205270565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215139.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 205270565 is about 14327.2664873660. The cubic root of 205270565 is about 589.8961466157.

The spelling of 205270565 in words is "two hundred five million, two hundred seventy thousand, five hundred sixty-five".