205149315 has 16 divisors (see below), whose sum is σ = 375130368. Its totient is φ = 93782496.

The previous prime is 205149293. The next prime is 205149359. The reversal of 205149315 is 513941502.

It is not a de Polignac number, because 205149315 - 2⁷ = 205149187 is a prime.

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, 976797 + ... + 977006.

It is an arithmetic number, because the mean of its divisors is an integer number (23445648).

Almost surely, 2^205149315 is an apocalyptic number.

205149315 is a deficient number, since it is larger than the sum of its proper divisors (169981053).

205149315 is a wasteful number, since it uses less digits than its factorization.

205149315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953818.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 205149315 is about 14323.0344201220. The cubic root of 205149315 is about 589.7799763710.

The spelling of 205149315 in words is "two hundred five million, one hundred forty-nine thousand, three hundred fifteen".