205125864 has 16 divisors (see below), whose sum is σ = 512814720. Its totient is φ = 68375280.

The previous prime is 205125827. The next prime is 205125913. The reversal of 205125864 is 468521502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4273432 + ... + 4273479.

It is an arithmetic number, because the mean of its divisors is an integer number (32050920).

Almost surely, 2^205125864 is an apocalyptic number.

205125864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

205125864 is an abundant number, since it is smaller than the sum of its proper divisors (307688856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205125864 is a wasteful number, since it uses less digits than its factorization.

205125864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8546920 (or 8546916 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 205125864 is about 14322.2157503649. The cubic root of 205125864 is about 589.7575025657.

The spelling of 205125864 in words is "two hundred five million, one hundred twenty-five thousand, eight hundred sixty-four".