13112215 has 4 divisors (see below), whose sum is σ = 15734664. Its totient is φ = 10489768.

The previous prime is 13112161. The next prime is 13112221. The reversal of 13112215 is 51221131.

13112215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13112215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1311217 + ... + 1311226.

It is an arithmetic number, because the mean of its divisors is an integer number (3933666).

Almost surely, 2^13112215 is an apocalyptic number.

13112215 is a deficient number, since it is larger than the sum of its proper divisors (2622449).

13112215 is an equidigital number, since it uses as much as digits as its factorization.

13112215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622448.

The product of its digits is 60, while the sum is 16.

The square root of 13112215 is about 3621.0792590055. The cubic root of 13112215 is about 235.8080827459.

Adding to 13112215 its reverse (51221131), we get a palindrome (64333346).

The spelling of 13112215 in words is "thirteen million, one hundred twelve thousand, two hundred fifteen".