205320106 has 4 divisors (see below), whose sum is σ = 307980162. Its totient is φ = 102660052.

The previous prime is 205320079. The next prime is 205320107. The reversal of 205320106 is 601023502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601023502 = 2 ⋅300511751.

It can be written as a sum of positive squares in only one way, i.e., 185204881 + 20115225 = 13609^2 + 4485^2 .

It is not an unprimeable number, because it can be changed into a prime (205320107) 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 as a sum of consecutive naturals, namely, 51330025 + ... + 51330028.

Almost surely, 2^205320106 is an apocalyptic number.

205320106 is a deficient number, since it is larger than the sum of its proper divisors (102660056).

205320106 is a wasteful number, since it uses less digits than its factorization.

205320106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102660055.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 205320106 is about 14328.9952892727. The cubic root of 205320106 is about 589.9435989368.

Adding to 205320106 its reverse (601023502), we get a palindrome (806343608).

The spelling of 205320106 in words is "two hundred five million, three hundred twenty thousand, one hundred six".