16085221 has 2 divisors, whose sum is σ = 16085222. Its totient is φ = 16085220.

The previous prime is 16085197. The next prime is 16085261. The reversal of 16085221 is 12258061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8328996 + 7756225 = 2886^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 16085221 - 2⁷ = 16085093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16085261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8042610 + 8042611.

It is an arithmetic number, because the mean of its divisors is an integer number (8042611).

Almost surely, 2^16085221 is an apocalyptic number.

It is an amenable number.

16085221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16085221 is an equidigital number, since it uses as much as digits as its factorization.

16085221 is an evil number, because the sum of its binary digits is even.

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

The square root of 16085221 is about 4010.6384778486. The cubic root of 16085221 is about 252.4308002377.

The spelling of 16085221 in words is "sixteen million, eighty-five thousand, two hundred twenty-one".