205053505 has 16 divisors (see below), whose sum is σ = 253064448. Its totient is φ = 159408000.

The previous prime is 205053503. The next prime is 205053521. The reversal of 205053505 is 505350502.

It is not a de Polignac number, because 205053505 - 2¹ = 205053503 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 205053505.

It is not an unprimeable number, because it can be changed into a prime (205053503) 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 15 ways as a sum of consecutive naturals, for example, 53710 + ... + 57400.

It is an arithmetic number, because the mean of its divisors is an integer number (15816528).

Almost surely, 2^205053505 is an apocalyptic number.

It is an amenable number.

205053505 is a deficient number, since it is larger than the sum of its proper divisors (48010943).

205053505 is a wasteful number, since it uses less digits than its factorization.

205053505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008.

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 205053505 is about 14319.6894170230. The cubic root of 205053505 is about 589.6881479410.

It can be divided in two parts, 2050 and 53505, that added together give a palindrome (55555).

The spelling of 205053505 in words is "two hundred five million, fifty-three thousand, five hundred five".