205513324111 has 4 divisors (see below), whose sum is σ = 207632018272. Its totient is φ = 203394629952.

The previous prime is 205513324103. The next prime is 205513324171. The reversal of 205513324111 is 111423315502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111423315502 = 2 ⋅55711657751.

It is a cyclic number.

It is not a de Polignac number, because 205513324111 - 2³ = 205513324103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205513324111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205513324171) 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, 1059346935 + ... + 1059347128.

It is an arithmetic number, because the mean of its divisors is an integer number (51908004568).

Almost surely, 2^205513324111 is an apocalyptic number.

205513324111 is a deficient number, since it is larger than the sum of its proper divisors (2118694161).

205513324111 is an equidigital number, since it uses as much as digits as its factorization.

205513324111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118694160.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 205513324111 its reverse (111423315502), we get a palindrome (316936639613).

The spelling of 205513324111 in words is "two hundred five billion, five hundred thirteen million, three hundred twenty-four thousand, one hundred eleven".