205122322513 has 4 divisors (see below), whose sum is σ = 205354625008. Its totient is φ = 204890020020.

The previous prime is 205122322501. The next prime is 205122322519. The reversal of 205122322513 is 315223221502.

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 205122322513 - 2⁹ = 205122322001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205122322519) 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, 116149923 + ... + 116151688.

It is an arithmetic number, because the mean of its divisors is an integer number (51338656252).

Almost surely, 2^205122322513 is an apocalyptic number.

It is an amenable number.

205122322513 is a deficient number, since it is larger than the sum of its proper divisors (232302495).

205122322513 is an equidigital number, since it uses as much as digits as its factorization.

205122322513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232302494.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 205122322513 in words is "two hundred five billion, one hundred twenty-two million, three hundred twenty-two thousand, five hundred thirteen".