13216812 has 48 divisors (see below), whose sum is σ = 36782592. Its totient is φ = 3611520.

The previous prime is 13216793. The next prime is 13216813. The reversal of 13216812 is 21861231.

It is not an unprimeable number, because it can be changed into a prime (13216813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489 + ... + 5352.

It is an arithmetic number, because the mean of its divisors is an integer number (766304).

Almost surely, 2^13216812 is an apocalyptic number.

13216812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13216812 is an abundant number, since it is smaller than the sum of its proper divisors (23565780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13216812 is a wasteful number, since it uses less digits than its factorization.

13216812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6878 (or 6876 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 13216812 is about 3635.4933640429. The cubic root of 13216812 is about 236.4334416918.

It can be divided in two parts, 13216 and 812, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13216812 in words is "thirteen million, two hundred sixteen thousand, eight hundred twelve".