722156213 has 2 divisors, whose sum is σ = 722156214. Its totient is φ = 722156212.

The previous prime is 722156203. The next prime is 722156249. The reversal of 722156213 is 312651227.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410386564 + 311769649 = 20258^2 + 17657^2 .

It is a cyclic number.

It is not a de Polignac number, because 722156213 - 2⁸ = 722155957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722156203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361078106 + 361078107.

It is an arithmetic number, because the mean of its divisors is an integer number (361078107).

Almost surely, 2^722156213 is an apocalyptic number.

It is an amenable number.

722156213 is a deficient number, since it is larger than the sum of its proper divisors (1).

722156213 is an equidigital number, since it uses as much as digits as its factorization.

722156213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 722156213 is about 26872.9643508118. The cubic root of 722156213 is about 897.1747672066.

The spelling of 722156213 in words is "seven hundred twenty-two million, one hundred fifty-six thousand, two hundred thirteen".