13206217 has 4 divisors (see below), whose sum is σ = 13632256. Its totient is φ = 12780180.

The previous prime is 13206191. The next prime is 13206227. The reversal of 13206217 is 71260231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13206217 - 2¹⁵ = 13173449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13206227) 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, 212973 + ... + 213034.

It is an arithmetic number, because the mean of its divisors is an integer number (3408064).

Almost surely, 2^13206217 is an apocalyptic number.

It is an amenable number.

13206217 is a deficient number, since it is larger than the sum of its proper divisors (426039).

13206217 is an equidigital number, since it uses as much as digits as its factorization.

13206217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426038.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 13206217 is about 3634.0359106646. The cubic root of 13206217 is about 236.3702473810.

Adding to 13206217 its reverse (71260231), we get a palindrome (84466448).

The spelling of 13206217 in words is "thirteen million, two hundred six thousand, two hundred seventeen".