205005560 has 16 divisors (see below), whose sum is σ = 461262600. Its totient is φ = 82002208.

The previous prime is 205005557. The next prime is 205005571. The reversal of 205005560 is 65500502.

It is a congruent number.

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, 2562530 + ... + 2562609.

Almost surely, 2^205005560 is an apocalyptic number.

205005560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205005560 is an abundant number, since it is smaller than the sum of its proper divisors (256257040).

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

205005560 is a wasteful number, since it uses less digits than its factorization.

205005560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125150 (or 5125146 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 205005560 is about 14318.0152255821. The cubic root of 205005560 is about 589.6421846495.

The spelling of 205005560 in words is "two hundred five million, five thousand, five hundred sixty".