205015056 has 80 divisors (see below), whose sum is σ = 549964800. Its totient is φ = 65761920.

The previous prime is 205015051. The next prime is 205015067. The reversal of 205015056 is 650510502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (205015051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145845 + ... + 147243.

It is an arithmetic number, because the mean of its divisors is an integer number (6874560).

Almost surely, 2^205015056 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 205015056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274982400).

205015056 is an abundant number, since it is smaller than the sum of its proper divisors (344949744).

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

205015056 is a wasteful number, since it uses less digits than its factorization.

205015056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 205015056 is about 14318.3468319496. The cubic root of 205015056 is about 589.6512887209.

Adding to 205015056 its reverse (650510502), we get a palindrome (855525558).

The spelling of 205015056 in words is "two hundred five million, fifteen thousand, fifty-six".