16222417 has 2 divisors, whose sum is σ = 16222418. Its totient is φ = 16222416.

The previous prime is 16222387. The next prime is 16222421. The reversal of 16222417 is 71422261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11723776 + 4498641 = 3424^2 + 2121^2 .

It is an emirp because it is prime and its reverse (71422261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16222417 - 2⁷ = 16222289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16222391 and 16222400.

It is not a weakly prime, because it can be changed into another prime (16222117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111208 + 8111209.

It is an arithmetic number, because the mean of its divisors is an integer number (8111209).

Almost surely, 2^16222417 is an apocalyptic number.

It is an amenable number.

16222417 is a deficient number, since it is larger than the sum of its proper divisors (1).

16222417 is an equidigital number, since it uses as much as digits as its factorization.

16222417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 16222417 is about 4027.7061710110. The cubic root of 16222417 is about 253.1464570948.

Adding to 16222417 its reverse (71422261), we get a palindrome (87644678).

The spelling of 16222417 in words is "sixteen million, two hundred twenty-two thousand, four hundred seventeen".