205663056 has 80 divisors (see below), whose sum is σ = 557107200. Its totient is φ = 65253760.

The previous prime is 205663019. The next prime is 205663063. The reversal of 205663056 is 650366502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343045 + ... + 343643.

It is an arithmetic number, because the mean of its divisors is an integer number (6963840).

Almost surely, 2^205663056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205663056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278553600).

205663056 is an abundant number, since it is smaller than the sum of its proper divisors (351444144).

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

205663056 is a wasteful number, since it uses less digits than its factorization.

205663056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 205663056 is about 14340.9572902230. The cubic root of 205663056 is about 590.2718808225.

The spelling of 205663056 in words is "two hundred five million, six hundred sixty-three thousand, fifty-six".