205020355 has 16 divisors (see below), whose sum is σ = 260352000. Its totient is φ = 154556640.

The previous prime is 205020341. The next prime is 205020379. The reversal of 205020355 is 553020502.

It is not a de Polignac number, because 205020355 - 2¹⁹ = 204496067 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 12496 + ... + 23794.

It is an arithmetic number, because the mean of its divisors is an integer number (16272000).

Almost surely, 2^205020355 is an apocalyptic number.

205020355 is a deficient number, since it is larger than the sum of its proper divisors (55331645).

205020355 is a wasteful number, since it uses less digits than its factorization.

205020355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11514.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 205020355 is about 14318.5318730658. The cubic root of 205020355 is about 589.6563688929.

Adding to 205020355 its reverse (553020502), we get a palindrome (758040857).

The spelling of 205020355 in words is "two hundred five million, twenty thousand, three hundred fifty-five".