205102073 has 4 divisors (see below), whose sum is σ = 223747728. Its totient is φ = 186456420.

The previous prime is 205102067. The next prime is 205102081. The reversal of 205102073 is 370201502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205102073 - 2²⁰ = 204053497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205102003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9322811 + ... + 9322832.

It is an arithmetic number, because the mean of its divisors is an integer number (55936932).

Almost surely, 2^205102073 is an apocalyptic number.

It is an amenable number.

205102073 is a deficient number, since it is larger than the sum of its proper divisors (18645655).

205102073 is a wasteful number, since it uses less digits than its factorization.

205102073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18645654.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 205102073 is about 14321.3851634540. The cubic root of 205102073 is about 589.7347011778.

Adding to 205102073 its reverse (370201502), we get a palindrome (575303575).

The spelling of 205102073 in words is "two hundred five million, one hundred two thousand, seventy-three".