13215227 has 4 divisors (see below), whose sum is σ = 13228176. Its totient is φ = 13202280.

The previous prime is 13215221. The next prime is 13215229. The reversal of 13215227 is 72251231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72251231 = 13 ⋅5557787.

It is a cyclic number.

It is not a de Polignac number, because 13215227 - 2¹⁰ = 13214203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13215221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4799 + ... + 7032.

It is an arithmetic number, because the mean of its divisors is an integer number (3307044).

Almost surely, 2^13215227 is an apocalyptic number.

13215227 is a deficient number, since it is larger than the sum of its proper divisors (12949).

13215227 is a wasteful number, since it uses less digits than its factorization.

13215227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12948.

The product of its digits is 840, while the sum is 23.

The square root of 13215227 is about 3635.2753678367. The cubic root of 13215227 is about 236.4239900433.

Adding to 13215227 its reverse (72251231), we get a palindrome (85466458).

The spelling of 13215227 in words is "thirteen million, two hundred fifteen thousand, two hundred twenty-seven".