128316205 has 4 divisors (see below), whose sum is σ = 153979452. Its totient is φ = 102652960.

The previous prime is 128316197. The next prime is 128316229. The reversal of 128316205 is 502613821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502613821 = 19 ⋅26453359.

It can be written as a sum of positive squares in 2 ways, for example, as 26770276 + 101545929 = 5174^2 + 10077^2 .

It is not a de Polignac number, because 128316205 - 2³ = 128316197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 12831616 + ... + 12831625.

It is an arithmetic number, because the mean of its divisors is an integer number (38494863).

Almost surely, 2^128316205 is an apocalyptic number.

It is an amenable number.

128316205 is a deficient number, since it is larger than the sum of its proper divisors (25663247).

128316205 is an equidigital number, since it uses as much as digits as its factorization.

128316205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25663246.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 128316205 is about 11327.6742979307. The cubic root of 128316205 is about 504.3830717578.

The spelling of 128316205 in words is "one hundred twenty-eight million, three hundred sixteen thousand, two hundred five".