205523985 has 8 divisors (see below), whose sum is σ = 328838400. Its totient is φ = 109612784.

The previous prime is 205523959. The next prime is 205524001. The reversal of 205523985 is 589325502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205523985 - 2⁶ = 205523921 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6850785 + ... + 6850814.

It is an arithmetic number, because the mean of its divisors is an integer number (41104800).

Almost surely, 2^205523985 is an apocalyptic number.

It is an amenable number.

205523985 is a deficient number, since it is larger than the sum of its proper divisors (123314415).

205523985 is a wasteful number, since it uses less digits than its factorization.

205523985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13701607.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 205523985 is about 14336.1077353653. The cubic root of 205523985 is about 590.1388019693.

The spelling of 205523985 in words is "two hundred five million, five hundred twenty-three thousand, nine hundred eighty-five".