205320505199 has 4 divisors (see below), whose sum is σ = 206362741464. Its totient is φ = 204278268936.

The previous prime is 205320505067. The next prime is 205320505211. The reversal of 205320505199 is 991505023502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205320505199 - 2⁸ = 205320504943 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 (205320555199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521117837 + ... + 521118230.

It is an arithmetic number, because the mean of its divisors is an integer number (51590685366).

Almost surely, 2^205320505199 is an apocalyptic number.

205320505199 is a deficient number, since it is larger than the sum of its proper divisors (1042236265).

205320505199 is a wasteful number, since it uses less digits than its factorization.

205320505199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042236264.

The product of its (nonzero) digits is 121500, while the sum is 41.

The spelling of 205320505199 in words is "two hundred five billion, three hundred twenty million, five hundred five thousand, one hundred ninety-nine".