205540250 has 16 divisors (see below), whose sum is σ = 384771816. Its totient is φ = 82216000.

The previous prime is 205540207. The next prime is 205540267. The reversal of 205540250 is 52045502.

It can be written as a sum of positive squares in 4 ways, for example, as 126810121 + 78730129 = 11261^2 + 8873^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 410831 + ... + 411330.

Almost surely, 2^205540250 is an apocalyptic number.

205540250 is a deficient number, since it is larger than the sum of its proper divisors (179231566).

205540250 is an equidigital number, since it uses as much as digits as its factorization.

205540250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822178 (or 822168 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 205540250 is about 14336.6749980600. The cubic root of 205540250 is about 590.1543692593.

Adding to 205540250 its reverse (52045502), we get a palindrome (257585752).

The spelling of 205540250 in words is "two hundred five million, five hundred forty thousand, two hundred fifty".