206330545 has 16 divisors (see below), whose sum is σ = 249757200. Its totient is φ = 163632384.

The previous prime is 206330521. The next prime is 206330617. The reversal of 206330545 is 545033602.

It can be written as a sum of positive squares in 8 ways, for example, as 8196769 + 198133776 = 2863^2 + 14076^2 .

It is a cyclic number.

It is not a de Polignac number, because 206330545 - 2⁷ = 206330417 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 552979 + ... + 553351.

It is an arithmetic number, because the mean of its divisors is an integer number (15609825).

Almost surely, 2^206330545 is an apocalyptic number.

It is an amenable number.

206330545 is a deficient number, since it is larger than the sum of its proper divisors (43426655).

206330545 is a wasteful number, since it uses less digits than its factorization.

206330545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 206330545 is about 14364.2105595818. The cubic root of 206330545 is about 590.9097761477.

The spelling of 206330545 in words is "two hundred six million, three hundred thirty thousand, five hundred forty-five".