13440215 has 8 divisors (see below), whose sum is σ = 16219440. Its totient is φ = 10691392.

The previous prime is 13440199. The next prime is 13440221. The reversal of 13440215 is 51204431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13440215 - 2⁴ = 13440199 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 6614 + ... + 8403.

It is an arithmetic number, because the mean of its divisors is an integer number (2027430).

Almost surely, 2^13440215 is an apocalyptic number.

13440215 is a deficient number, since it is larger than the sum of its proper divisors (2779225).

13440215 is a wasteful number, since it uses less digits than its factorization.

13440215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15201.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 13440215 is about 3666.0898788764. The cubic root of 13440215 is about 237.7581459046.

Adding to 13440215 its reverse (51204431), we get a palindrome (64644646).

The spelling of 13440215 in words is "thirteen million, four hundred forty thousand, two hundred fifteen".