205545315 has 16 divisors (see below), whose sum is σ = 329216256. Its totient is φ = 109509600.

The previous prime is 205545299. The next prime is 205545337. The reversal of 205545315 is 513545502.

It is a happy number.

It is not a de Polignac number, because 205545315 - 2⁴ = 205545299 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, 8820 + ... + 22110.

It is an arithmetic number, because the mean of its divisors is an integer number (20576016).

Almost surely, 2^205545315 is an apocalyptic number.

205545315 is a deficient number, since it is larger than the sum of its proper divisors (123670941).

205545315 is a wasteful number, since it uses less digits than its factorization.

205545315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14330.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 205545315 is about 14336.8516418355. The cubic root of 205545315 is about 590.1592168213.

The spelling of 205545315 in words is "two hundred five million, five hundred forty-five thousand, three hundred fifteen".