205046561 has 8 divisors (see below), whose sum is σ = 209805984. Its totient is φ = 200340000.

The previous prime is 205046539. The next prime is 205046591. The reversal of 205046561 is 165640502.

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 205046561 - 2⁶ = 205046497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205046531) 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 7 ways as a sum of consecutive naturals, for example, 5315 + ... + 20936.

It is an arithmetic number, because the mean of its divisors is an integer number (26225748).

Almost surely, 2^205046561 is an apocalyptic number.

It is an amenable number.

205046561 is a deficient number, since it is larger than the sum of its proper divisors (4759423).

205046561 is a wasteful number, since it uses less digits than its factorization.

205046561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26431.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 205046561 is about 14319.4469516109. The cubic root of 205046561 is about 589.6814914008.

The spelling of 205046561 in words is "two hundred five million, forty-six thousand, five hundred sixty-one".