205250510050 has 24 divisors (see below), whose sum is σ = 382114059876. Its totient is φ = 82025341440.

The previous prime is 205250510039. The next prime is 205250510053. The reversal of 205250510050 is 50015052502.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 120830626449 + 84419883601 = 347607^2 + 290551^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a junction number, because it is equal to n+sod(n) for n = 205250509997 and 205250510024.

It is not an unprimeable number, because it can be changed into a prime (205250510053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1816167 + ... + 1925866.

Almost surely, 2^205250510050 is an apocalyptic number.

205250510050 is a deficient number, since it is larger than the sum of its proper divisors (176863549826).

205250510050 is a wasteful number, since it uses less digits than its factorization.

205250510050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743142 (or 3743137 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

Adding to 205250510050 its reverse (50015052502), we get a palindrome (255265562552).

The spelling of 205250510050 in words is "two hundred five billion, two hundred fifty million, five hundred ten thousand, fifty".