205881385 has 32 divisors (see below), whose sum is σ = 265420800. Its totient is φ = 153036480.

The previous prime is 205881343. The next prime is 205881409. The reversal of 205881385 is 583188502.

It is not a de Polignac number, because 205881385 - 2²⁵ = 172326953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429576 + ... + 430054.

It is an arithmetic number, because the mean of its divisors is an integer number (8294400).

Almost surely, 2^205881385 is an apocalyptic number.

It is an amenable number.

205881385 is a deficient number, since it is larger than the sum of its proper divisors (59539415).

205881385 is a wasteful number, since it uses less digits than its factorization.

205881385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 205881385 is about 14348.5673500876. The cubic root of 205881385 is about 590.4806817215.

The spelling of 205881385 in words is "two hundred five million, eight hundred eighty-one thousand, three hundred eighty-five".