722321213 has 2 divisors, whose sum is σ = 722321214. Its totient is φ = 722321212.

The previous prime is 722321209. The next prime is 722321227. The reversal of 722321213 is 312123227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698914969 + 23406244 = 26437^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 722321213 - 2² = 722321209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722321113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361160606 + 361160607.

It is an arithmetic number, because the mean of its divisors is an integer number (361160607).

Almost surely, 2^722321213 is an apocalyptic number.

It is an amenable number.

722321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

722321213 is an equidigital number, since it uses as much as digits as its factorization.

722321213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 23.

The square root of 722321213 is about 26876.0341754508. The cubic root of 722321213 is about 897.2430915575.

The spelling of 722321213 in words is "seven hundred twenty-two million, three hundred twenty-one thousand, two hundred thirteen".