205021616 has 20 divisors (see below), whose sum is σ = 399900000. Its totient is φ = 101821632.

The previous prime is 205021613. The next prime is 205021627. The reversal of 205021616 is 616120502.

It is a junction number, because it is equal to n+sod(n) for n = 205021591 and 205021600.

It is not an unprimeable number, because it can be changed into a prime (205021613) 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, 40616 + ... + 45383.

It is an arithmetic number, because the mean of its divisors is an integer number (19995000).

Almost surely, 2^205021616 is an apocalyptic number.

It is an amenable number.

205021616 is a deficient number, since it is larger than the sum of its proper divisors (194878384).

205021616 is a wasteful number, since it uses less digits than its factorization.

205021616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86156 (or 86150 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 205021616 is about 14318.5759068421. The cubic root of 205021616 is about 589.6575778056.

The spelling of 205021616 in words is "two hundred five million, twenty-one thousand, six hundred sixteen".