205030965287 has 16 divisors (see below), whose sum is σ = 212968949760. Its totient is φ = 197270659872.

The previous prime is 205030965283. The next prime is 205030965301. The reversal of 205030965287 is 782569030502.

205030965287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 205030965287 - 2² = 205030965283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205030965281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662414 + ... + 921332.

It is an arithmetic number, because the mean of its divisors is an integer number (13310559360).

Almost surely, 2^205030965287 is an apocalyptic number.

205030965287 is a deficient number, since it is larger than the sum of its proper divisors (7937984473).

205030965287 is a wasteful number, since it uses less digits than its factorization.

205030965287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259262.

The product of its (nonzero) digits is 907200, while the sum is 47.

Adding to 205030965287 its reverse (782569030502), we get a palindrome (987599995789).

The spelling of 205030965287 in words is "two hundred five billion, thirty million, nine hundred sixty-five thousand, two hundred eighty-seven".