716222221 has 16 divisors (see below), whose sum is σ = 842542848. Its totient is φ = 600235200.

The previous prime is 716222219. The next prime is 716222239. The reversal of 716222221 is 122222617.

716222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 716222221 - 2¹ = 716222219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716222281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122556 + ... + 128266.

It is an arithmetic number, because the mean of its divisors is an integer number (52658928).

Almost surely, 2^716222221 is an apocalyptic number.

It is an amenable number.

716222221 is a deficient number, since it is larger than the sum of its proper divisors (126320627).

716222221 is a wasteful number, since it uses less digits than its factorization.

716222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612.

The product of its digits is 1344, while the sum is 25.

The square root of 716222221 is about 26762.3283927240. The cubic root of 716222221 is about 894.7106295871.

Adding to 716222221 its reverse (122222617), we get a palindrome (838444838).

The spelling of 716222221 in words is "seven hundred sixteen million, two hundred twenty-two thousand, two hundred twenty-one".