133316305 has 4 divisors (see below), whose sum is σ = 159979572. Its totient is φ = 106653040.

The previous prime is 133316273. The next prime is 133316311. The reversal of 133316305 is 503613331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503613331 = 13 ⋅38739487.

It can be written as a sum of positive squares in 2 ways, for example, as 86694721 + 46621584 = 9311^2 + 6828^2 .

It is not a de Polignac number, because 133316305 - 2⁵ = 133316273 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 133316305.

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, 13331626 + ... + 13331635.

It is an arithmetic number, because the mean of its divisors is an integer number (39994893).

Almost surely, 2^133316305 is an apocalyptic number.

It is an amenable number.

133316305 is a deficient number, since it is larger than the sum of its proper divisors (26663267).

133316305 is an equidigital number, since it uses as much as digits as its factorization.

133316305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26663266.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 133316305 is about 11546.2680117863. The cubic root of 133316305 is about 510.8512057157.

Adding to 133316305 its reverse (503613331), we get a palindrome (636929636).

The spelling of 133316305 in words is "one hundred thirty-three million, three hundred sixteen thousand, three hundred five".