13216155 has 8 divisors (see below), whose sum is σ = 21145872. Its totient is φ = 7048608.

The previous prime is 13216127. The next prime is 13216171. The reversal of 13216155 is 55161231.

13216155 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13216155 - 2¹⁶ = 13150619 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 440524 + ... + 440553.

It is an arithmetic number, because the mean of its divisors is an integer number (2643234).

Almost surely, 2^13216155 is an apocalyptic number.

13216155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13216155 is a deficient number, since it is larger than the sum of its proper divisors (7929717).

13216155 is an equidigital number, since it uses as much as digits as its factorization.

13216155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881085.

The product of its digits is 900, while the sum is 24.

The square root of 13216155 is about 3635.4030037948. The cubic root of 13216155 is about 236.4295239708.

Adding to 13216155 its reverse (55161231), we get a palindrome (68377386).

The spelling of 13216155 in words is "thirteen million, two hundred sixteen thousand, one hundred fifty-five".