16221983 has 2 divisors, whose sum is σ = 16221984. Its totient is φ = 16221982.

The previous prime is 16221977. The next prime is 16222001. The reversal of 16221983 is 38912261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16221983 - 2⁸ = 16221727 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16521983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110991 + 8110992.

It is an arithmetic number, because the mean of its divisors is an integer number (8110992).

Almost surely, 2^16221983 is an apocalyptic number.

16221983 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221983 is an equidigital number, since it uses as much as digits as its factorization.

16221983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 16221983 is about 4027.6522938307. The cubic root of 16221983 is about 253.1441995903.

The spelling of 16221983 in words is "sixteen million, two hundred twenty-one thousand, nine hundred eighty-three".