722213 has 2 divisors, whose sum is σ = 722214. Its totient is φ = 722212.

The previous prime is 722173. The next prime is 722237. The reversal of 722213 is 312227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 334084 = 623^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 722213 - 2⁶ = 722149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722191 and 722200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361106 + 361107.

It is an arithmetic number, because the mean of its divisors is an integer number (361107).

2⁷²²²¹³ is an apocalyptic number.

It is an amenable number.

722213 is a deficient number, since it is larger than the sum of its proper divisors (1).

722213 is an equidigital number, since it uses as much as digits as its factorization.

722213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 17.

The square root of 722213 is about 849.8311597017. The cubic root of 722213 is about 89.7198283138.

The spelling of 722213 in words is "seven hundred twenty-two thousand, two hundred thirteen".