205550355 has 32 divisors (see below), whose sum is σ = 339001344. Its totient is φ = 106275456.

The previous prime is 205550353. The next prime is 205550357. The reversal of 205550355 is 553055502.

It is an interprime number because it is at equal distance from previous prime (205550353) and next prime (205550357).

It is not a de Polignac number, because 205550355 - 2¹ = 205550353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205550351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212082 + ... + 213048.

It is an arithmetic number, because the mean of its divisors is an integer number (10593792).

Almost surely, 2^205550355 is an apocalyptic number.

205550355 is a deficient number, since it is larger than the sum of its proper divisors (133450989).

205550355 is a wasteful number, since it uses less digits than its factorization.

205550355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 205550355 is about 14337.0274115662. The cubic root of 205550355 is about 590.1640403775.

The spelling of 205550355 in words is "two hundred five million, five hundred fifty thousand, three hundred fifty-five".