16288021 has 2 divisors, whose sum is σ = 16288022. Its totient is φ = 16288020.

The previous prime is 16288007. The next prime is 16288031. The reversal of 16288021 is 12088261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 5692996 = 3255^2 + 2386^2 .

It is an emirp because it is prime and its reverse (12088261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16288021 - 2⁷ = 16287893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16288031) 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, 8144010 + 8144011.

It is an arithmetic number, because the mean of its divisors is an integer number (8144011).

Almost surely, 2^16288021 is an apocalyptic number.

It is an amenable number.

16288021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16288021 is an equidigital number, since it uses as much as digits as its factorization.

16288021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 16288021 is about 4035.8420434898. The cubic root of 16288021 is about 253.4872423869.

The spelling of 16288021 in words is "sixteen million, two hundred eighty-eight thousand, twenty-one".