14517221 has 2 divisors, whose sum is σ = 14517222. Its totient is φ = 14517220.

The previous prime is 14517203. The next prime is 14517229. The reversal of 14517221 is 12271541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14145121 + 372100 = 3761^2 + 610^2 .

It is an emirp because it is prime and its reverse (12271541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14517221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14517229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7258610 + 7258611.

It is an arithmetic number, because the mean of its divisors is an integer number (7258611).

Almost surely, 2^14517221 is an apocalyptic number.

It is an amenable number.

14517221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14517221 is an equidigital number, since it uses as much as digits as its factorization.

14517221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 23.

The square root of 14517221 is about 3810.1471100208. The cubic root of 14517221 is about 243.9464464122.

Adding to 14517221 its reverse (12271541), we get a palindrome (26788762).

The spelling of 14517221 in words is "fourteen million, five hundred seventeen thousand, two hundred twenty-one".