205000540 has 12 divisors (see below), whose sum is σ = 430501176. Its totient is φ = 82000208.

The previous prime is 205000529. The next prime is 205000559. The reversal of 205000540 is 45000502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5124994 + ... + 5125033.

It is an arithmetic number, because the mean of its divisors is an integer number (35875098).

Almost surely, 2^205000540 is an apocalyptic number.

205000540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205000540 is an abundant number, since it is smaller than the sum of its proper divisors (225500636).

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

205000540 is a wasteful number, since it uses less digits than its factorization.

205000540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250036 (or 10250034 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 205000540 is about 14317.8399208819. The cubic root of 205000540 is about 589.6373717265.

The spelling of 205000540 in words is "two hundred five million, five hundred forty", and thus it is an aban number.