13308305 has 4 divisors (see below), whose sum is σ = 15969972. Its totient is φ = 10646640.

The previous prime is 13308301. The next prime is 13308319. The reversal of 13308305 is 50380331.

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 10182481 + 3125824 = 3191^2 + 1768^2 .

It is not a de Polignac number, because 13308305 - 2² = 13308301 is a prime.

It is a super-2 number, since 2×13308305² = 354221963946050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13308301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330826 + ... + 1330835.

It is an arithmetic number, because the mean of its divisors is an integer number (3992493).

Almost surely, 2^13308305 is an apocalyptic number.

It is an amenable number.

13308305 is a deficient number, since it is larger than the sum of its proper divisors (2661667).

13308305 is an equidigital number, since it uses as much as digits as its factorization.

13308305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661666.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 13308305 is about 3648.0549612088. The cubic root of 13308305 is about 236.9777555128.

Adding to 13308305 its reverse (50380331), we get a palindrome (63688636).

The spelling of 13308305 in words is "thirteen million, three hundred eight thousand, three hundred five".