16221743 has 2 divisors, whose sum is σ = 16221744. Its totient is φ = 16221742.

The previous prime is 16221727. The next prime is 16221749. The reversal of 16221743 is 34712261.

It is a strong prime.

It is an emirp because it is prime and its reverse (34712261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16221743 - 2⁴ = 16221727 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16221749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110871 + 8110872.

It is an arithmetic number, because the mean of its divisors is an integer number (8110872).

Almost surely, 2^16221743 is an apocalyptic number.

16221743 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221743 is an equidigital number, since it uses as much as digits as its factorization.

16221743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 16221743 is about 4027.6224996889. The cubic root of 16221743 is about 253.1429511833.

The spelling of 16221743 in words is "sixteen million, two hundred twenty-one thousand, seven hundred forty-three".