205350405 has 16 divisors (see below), whose sum is σ = 353834880. Its totient is φ = 101095488.

The previous prime is 205350401. The next prime is 205350419. The reversal of 205350405 is 504053502.

It is not a de Polignac number, because 205350405 - 2² = 205350401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205350401) 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, 526345 + ... + 526734.

It is an arithmetic number, because the mean of its divisors is an integer number (22114680).

Almost surely, 2^205350405 is an apocalyptic number.

It is an amenable number.

205350405 is a deficient number, since it is larger than the sum of its proper divisors (148484475).

205350405 is a wasteful number, since it uses less digits than its factorization.

205350405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053100.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 205350405 is about 14330.0525121159. The cubic root of 205350405 is about 589.9726167507.

The spelling of 205350405 in words is "two hundred five million, three hundred fifty thousand, four hundred five".