722367221 has 2 divisors, whose sum is σ = 722367222. Its totient is φ = 722367220.

The previous prime is 722367203. The next prime is 722367227. The reversal of 722367221 is 122763227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 517562500 + 204804721 = 22750^2 + 14311^2 .

It is an emirp because it is prime and its reverse (122763227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722367221 - 2¹⁸ = 722105077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722367227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361183610 + 361183611.

It is an arithmetic number, because the mean of its divisors is an integer number (361183611).

Almost surely, 2^722367221 is an apocalyptic number.

It is an amenable number.

722367221 is a deficient number, since it is larger than the sum of its proper divisors (1).

722367221 is an equidigital number, since it uses as much as digits as its factorization.

722367221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 32.

The square root of 722367221 is about 26876.8900916754. The cubic root of 722367221 is about 897.2621410159.

The spelling of 722367221 in words is "seven hundred twenty-two million, three hundred sixty-seven thousand, two hundred twenty-one".