16522417 has 2 divisors, whose sum is σ = 16522418. Its totient is φ = 16522416.

The previous prime is 16522409. The next prime is 16522421. The reversal of 16522417 is 71422561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11861136 + 4661281 = 3444^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 16522417 - 2³ = 16522409 is a prime.

It is not a weakly prime, because it can be changed into another prime (16522447) 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, 8261208 + 8261209.

It is an arithmetic number, because the mean of its divisors is an integer number (8261209).

Almost surely, 2^16522417 is an apocalyptic number.

It is an amenable number.

16522417 is a deficient number, since it is larger than the sum of its proper divisors (1).

16522417 is an equidigital number, since it uses as much as digits as its factorization.

16522417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 16522417 is about 4064.7776076927. Note that the first 3 decimals coincide. The cubic root of 16522417 is about 254.6974086024.

Adding to 16522417 its reverse (71422561), we get a palindrome (87944978).

The spelling of 16522417 in words is "sixteen million, five hundred twenty-two thousand, four hundred seventeen".