205132105 has 4 divisors (see below), whose sum is σ = 246158532. Its totient is φ = 164105680.

The previous prime is 205132087. The next prime is 205132129. The reversal of 205132105 is 501231502.

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 140683321 + 64448784 = 11861^2 + 8028^2 .

It is not a de Polignac number, because 205132105 - 2⁷ = 205131977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20513206 + ... + 20513215.

It is an arithmetic number, because the mean of its divisors is an integer number (61539633).

Almost surely, 2^205132105 is an apocalyptic number.

It is an amenable number.

205132105 is a deficient number, since it is larger than the sum of its proper divisors (41026427).

205132105 is an equidigital number, since it uses as much as digits as its factorization.

205132105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41026426.

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

The square root of 205132105 is about 14322.4336270063. The cubic root of 205132105 is about 589.7634836728.

Adding to 205132105 its reverse (501231502), we get a palindrome (706363607).

The spelling of 205132105 in words is "two hundred five million, one hundred thirty-two thousand, one hundred five".