205102300105 has 4 divisors (see below), whose sum is σ = 246122760132. Its totient is φ = 164081840080.

The previous prime is 205102300093. The next prime is 205102300159. The reversal of 205102300105 is 501003201502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 78364164096 + 126738136009 = 279936^2 + 356003^2 .

It is not a de Polignac number, because 205102300105 - 2¹⁷ = 205102169033 is a prime.

It is a super-2 number, since 2×205102300105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20510230006 + ... + 20510230015.

It is an arithmetic number, because the mean of its divisors is an integer number (61530690033).

Almost surely, 2^205102300105 is an apocalyptic number.

It is an amenable number.

205102300105 is a deficient number, since it is larger than the sum of its proper divisors (41020460027).

205102300105 is an equidigital number, since it uses as much as digits as its factorization.

205102300105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41020460026.

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 205102300105 its reverse (501003201502), we get a palindrome (706105501607).

The spelling of 205102300105 in words is "two hundred five billion, one hundred two million, three hundred thousand, one hundred five".