205855210 has 32 divisors (see below), whose sum is σ = 428006592. Its totient is φ = 70452480.

The previous prime is 205855183. The next prime is 205855213. The reversal of 205855210 is 12558502.

It is not an unprimeable number, because it can be changed into a prime (205855213) 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, 53172 + ... + 56911.

It is an arithmetic number, because the mean of its divisors is an integer number (13375206).

Almost surely, 2^205855210 is an apocalyptic number.

205855210 is an abundant number, since it is smaller than the sum of its proper divisors (222151382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205855210 is a wasteful number, since it uses less digits than its factorization.

205855210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110118.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 205855210 is about 14347.6552091274. The cubic root of 205855210 is about 590.4556568155.

The spelling of 205855210 in words is "two hundred five million, eight hundred fifty-five thousand, two hundred ten".