205311104 has 32 divisors (see below), whose sum is σ = 409664640. Its totient is φ = 102493440.

The previous prime is 205311089. The next prime is 205311107. The reversal of 205311104 is 401113502.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (205311107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156917 + ... + 158219.

It is an arithmetic number, because the mean of its divisors is an integer number (12802020).

Almost surely, 2^205311104 is an apocalyptic number.

It is an amenable number.

205311104 is a deficient number, since it is larger than the sum of its proper divisors (204353536).

205311104 is a wasteful number, since it uses less digits than its factorization.

205311104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 205311104 is about 14328.6811675046. The cubic root of 205311104 is about 589.9349770341.

Adding to 205311104 its reverse (401113502), we get a palindrome (606424606).

The spelling of 205311104 in words is "two hundred five million, three hundred eleven thousand, one hundred four".