16227217 has 2 divisors, whose sum is σ = 16227218. Its totient is φ = 16227216.

The previous prime is 16227191. The next prime is 16227241. The reversal of 16227217 is 71272261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 553536 = 3959^2 + 744^2 .

It is a cyclic number.

It is not a de Polignac number, because 16227217 - 2⁷ = 16227089 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (16227287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8113608 + 8113609.

It is an arithmetic number, because the mean of its divisors is an integer number (8113609).

Almost surely, 2^16227217 is an apocalyptic number.

It is an amenable number.

16227217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16227217 is an equidigital number, since it uses as much as digits as its factorization.

16227217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 28.

The square root of 16227217 is about 4028.3019996023. The cubic root of 16227217 is about 253.1714222027.

Adding to 16227217 its reverse (71272261), we get a palindrome (87499478).

The spelling of 16227217 in words is "sixteen million, two hundred twenty-seven thousand, two hundred seventeen".