16122217 has 2 divisors, whose sum is σ = 16122218. Its totient is φ = 16122216.

The previous prime is 16122199. The next prime is 16122233. The reversal of 16122217 is 71222161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 7502121 = 2936^2 + 2739^2 .

It is a cyclic number.

It is not a de Polignac number, because 16122217 - 2¹⁵ = 16089449 is a prime.

It is a super-4 number, since 4×16122217⁴ (a number of 30 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16122257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061108 + 8061109.

It is an arithmetic number, because the mean of its divisors is an integer number (8061109).

Almost surely, 2^16122217 is an apocalyptic number.

It is an amenable number.

16122217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16122217 is an equidigital number, since it uses as much as digits as its factorization.

16122217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 16122217 is about 4015.2480620754. The cubic root of 16122217 is about 252.6241822906.

Adding to 16122217 its reverse (71222161), we get a palindrome (87344378).

The spelling of 16122217 in words is "sixteen million, one hundred twenty-two thousand, two hundred seventeen".