13869215 has 4 divisors (see below), whose sum is σ = 16643064. Its totient is φ = 11095368.

The previous prime is 13869209. The next prime is 13869227. The reversal of 13869215 is 51296831.

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 13869215 - 2⁶ = 13869151 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386917 + ... + 1386926.

It is an arithmetic number, because the mean of its divisors is an integer number (4160766).

Almost surely, 2^13869215 is an apocalyptic number.

13869215 is a deficient number, since it is larger than the sum of its proper divisors (2773849).

13869215 is an equidigital number, since it uses as much as digits as its factorization.

13869215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773848.

The product of its digits is 12960, while the sum is 35.

The square root of 13869215 is about 3724.1394979243. The cubic root of 13869215 is about 240.2613761201.

It can be divided in two parts, 1386 and 9215, that added together give a palindrome (10601).

The spelling of 13869215 in words is "thirteen million, eight hundred sixty-nine thousand, two hundred fifteen".