16522081 has 2 divisors, whose sum is σ = 16522082. Its totient is φ = 16522080.

The previous prime is 16522067. The next prime is 16522087. The reversal of 16522081 is 18022561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 3272481 = 3640^2 + 1809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16522081 is a prime.

It is a super-2 number, since 2×16522081² = 545958321141122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16522087) 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, 8261040 + 8261041.

It is an arithmetic number, because the mean of its divisors is an integer number (8261041).

Almost surely, 2^16522081 is an apocalyptic number.

It is an amenable number.

16522081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16522081 is an equidigital number, since it uses as much as digits as its factorization.

16522081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 16522081 is about 4064.7362768081. The cubic root of 16522081 is about 254.6956820812.

The spelling of 16522081 in words is "sixteen million, five hundred twenty-two thousand, eighty-one".