13440217 has 16 divisors (see below), whose sum is σ = 16578432. Its totient is φ = 10632960.

The previous prime is 13440199. The next prime is 13440221. The reversal of 13440217 is 71204431.

13440217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13440217 - 2²³ = 5051609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13440617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5242 + ... + 7372.

It is an arithmetic number, because the mean of its divisors is an integer number (1036152).

Almost surely, 2^13440217 is an apocalyptic number.

13440217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13440217 is a deficient number, since it is larger than the sum of its proper divisors (3138215).

13440217 is a wasteful number, since it uses less digits than its factorization.

13440217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 13440217 is about 3666.0901516466. The cubic root of 13440217 is about 237.7581576979.

Adding to 13440217 its reverse (71204431), we get a palindrome (84644648).

The spelling of 13440217 in words is "thirteen million, four hundred forty thousand, two hundred seventeen".