13221415 has 8 divisors (see below), whose sum is σ = 15909840. Its totient is φ = 10547712.

The previous prime is 13221413. The next prime is 13221421. The reversal of 13221415 is 51412231.

13221415 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 a cyclic number.

It is not a de Polignac number, because 13221415 - 2¹ = 13221413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13221392 and 13221401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221413) 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, 1594 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (1988730).

Almost surely, 2^13221415 is an apocalyptic number.

13221415 is a deficient number, since it is larger than the sum of its proper divisors (2688425).

13221415 is an equidigital number, since it uses as much as digits as its factorization.

13221415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7361.

The product of its digits is 240, while the sum is 19.

The square root of 13221415 is about 3636.1263729414. The cubic root of 13221415 is about 236.4608859504.

Adding to 13221415 its reverse (51412231), we get a palindrome (64633646).

The spelling of 13221415 in words is "thirteen million, two hundred twenty-one thousand, four hundred fifteen".