13815227 has 4 divisors (see below), whose sum is σ = 14109216. Its totient is φ = 13521240.

The previous prime is 13815209. The next prime is 13815229. The reversal of 13815227 is 72251831.

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

It is a cyclic number.

It is not a de Polignac number, because 13815227 - 2¹² = 13811131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13815227.

It is not an unprimeable number, because it can be changed into a prime (13815229) 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, 146924 + ... + 147017.

It is an arithmetic number, because the mean of its divisors is an integer number (3527304).

Almost surely, 2^13815227 is an apocalyptic number.

13815227 is a deficient number, since it is larger than the sum of its proper divisors (293989).

13815227 is an equidigital number, since it uses as much as digits as its factorization.

13815227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293988.

The product of its digits is 3360, while the sum is 29.

The square root of 13815227 is about 3716.8840444652. The cubic root of 13815227 is about 239.9492195805.

The spelling of 13815227 in words is "thirteen million, eight hundred fifteen thousand, two hundred twenty-seven".