205324155 has 24 divisors (see below), whose sum is σ = 360189648. Its totient is φ = 108184896.

The previous prime is 205324139. The next prime is 205324169. The reversal of 205324155 is 551423502.

It is a happy number.

It is not a de Polignac number, because 205324155 - 2⁴ = 205324139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23752 + ... + 31221.

It is an arithmetic number, because the mean of its divisors is an integer number (15007902).

Almost surely, 2^205324155 is an apocalyptic number.

205324155 is a deficient number, since it is larger than the sum of its proper divisors (154865493).

205324155 is a wasteful number, since it uses less digits than its factorization.

205324155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55067 (or 55064 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 205324155 is about 14329.1365755233. The cubic root of 205324155 is about 589.9474768910.

Adding to 205324155 its reverse (551423502), we get a palindrome (756747657).

The spelling of 205324155 in words is "two hundred five million, three hundred twenty-four thousand, one hundred fifty-five".