13212416 has 72 divisors (see below), whose sum is σ = 30856224. Its totient is φ = 5529600.

The previous prime is 13212413. The next prime is 13212427. The reversal of 13212416 is 61421231.

It is not an unprimeable number, because it can be changed into a prime (13212413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130766 + ... + 130866.

Almost surely, 2^13212416 is an apocalyptic number.

13212416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13212416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15428112).

13212416 is an abundant number, since it is smaller than the sum of its proper divisors (17643808).

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

13212416 is an equidigital number, since it uses as much as digits as its factorization.

13212416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 183 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 13212416 is about 3634.8887190669. Note that the first 3 decimals coincide. The cubic root of 13212416 is about 236.4072256708.

Adding to 13212416 its reverse (61421231), we get a palindrome (74633647).

The spelling of 13212416 in words is "thirteen million, two hundred twelve thousand, four hundred sixteen".