13216365 has 20 divisors (see below), whose sum is σ = 23692284. Its totient is φ = 7048512.

The previous prime is 13216337. The next prime is 13216369. The reversal of 13216365 is 56361231.

13216365 is a `hidden beast` number, since 1 + 3 + 21 + 636 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 6215049 = 2646^2 + 2493^2 .

It is not a de Polignac number, because 13216365 - 2¹⁴ = 13199981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15912 + ... + 16721.

Almost surely, 2^13216365 is an apocalyptic number.

13216365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13216365 is a deficient number, since it is larger than the sum of its proper divisors (10475919).

13216365 is an equidigital number, since it uses as much as digits as its factorization.

13216365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32650 (or 32641 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 13216365 is about 3635.4318863101. The cubic root of 13216365 is about 236.4307762245.

Adding to 13216365 its reverse (56361231), we get a palindrome (69577596).

The spelling of 13216365 in words is "thirteen million, two hundred sixteen thousand, three hundred sixty-five".