205222050 has 108 divisors (see below), whose sum is σ = 606204690. Its totient is φ = 49737600.

The previous prime is 205222049. The next prime is 205222063. The reversal of 205222050 is 50222502.

It can be written as a sum of positive squares in 3 ways, for example, as 180391761 + 24830289 = 13431^2 + 4983^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 52566 + ... + 56334.

Almost surely, 2^205222050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205222050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303102345).

205222050 is an abundant number, since it is smaller than the sum of its proper divisors (400982640).

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

205222050 is a wasteful number, since it uses less digits than its factorization.

205222050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3790 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 205222050 is about 14325.5732869578. The cubic root of 205222050 is about 589.8496696378.

Adding to 205222050 its reverse (50222502), we get a palindrome (255444552).

The spelling of 205222050 in words is "two hundred five million, two hundred twenty-two thousand, fifty".