13215073 has 4 divisors (see below), whose sum is σ = 13464468. Its totient is φ = 12965680.

The previous prime is 13215053. The next prime is 13215091. The reversal of 13215073 is 37051231.

13215073 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 can be written as a sum of positive squares in 2 ways, for example, as 9102289 + 4112784 = 3017^2 + 2028^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215073 - 2⁹ = 13214561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13215053) 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 3 ways as a sum of consecutive naturals, for example, 124618 + ... + 124723.

It is an arithmetic number, because the mean of its divisors is an integer number (3366117).

Almost surely, 2^13215073 is an apocalyptic number.

It is an amenable number.

13215073 is a deficient number, since it is larger than the sum of its proper divisors (249395).

13215073 is an equidigital number, since it uses as much as digits as its factorization.

13215073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249394.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13215073 is about 3635.2541864359. The cubic root of 13215073 is about 236.4230716725.

The spelling of 13215073 in words is "thirteen million, two hundred fifteen thousand, seventy-three".