205000545 has 16 divisors (see below), whose sum is σ = 328180032. Its totient is φ = 109273920.

The previous prime is 205000529. The next prime is 205000559. The reversal of 205000545 is 545000502.

It is not a de Polignac number, because 205000545 - 2⁴ = 205000529 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46194 + ... + 50436.

It is an arithmetic number, because the mean of its divisors is an integer number (20511252).

Almost surely, 2^205000545 is an apocalyptic number.

It is an amenable number.

205000545 is a deficient number, since it is larger than the sum of its proper divisors (123179487).

205000545 is a wasteful number, since it uses less digits than its factorization.

205000545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7472.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 205000545 is about 14317.8400954893. The cubic root of 205000545 is about 589.6373765203.

The spelling of 205000545 in words is "two hundred five million, five hundred forty-five", and thus it is an aban number.