722294217 has 6 divisors (see below), whose sum is σ = 1043313882. Its totient is φ = 481529472.

The previous prime is 722294207. The next prime is 722294219. The reversal of 722294217 is 712492227.

722294217 is a `hidden beast` number, since 7 + 2 + 229 + 421 + 7 = 666.

722294217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 712409481 + 9884736 = 26691^2 + 3144^2 .

It is not a de Polignac number, because 722294217 - 2⁸ = 722293961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722294219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40127448 + ... + 40127465.

It is an arithmetic number, because the mean of its divisors is an integer number (173885647).

Almost surely, 2^722294217 is an apocalyptic number.

It is an amenable number.

722294217 is a deficient number, since it is larger than the sum of its proper divisors (321019665).

722294217 is a wasteful number, since it uses less digits than its factorization.

722294217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80254919 (or 80254916 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 722294217 is about 26875.5319389217. The cubic root of 722294217 is about 897.2319135775.

The spelling of 722294217 in words is "seven hundred twenty-two million, two hundred ninety-four thousand, two hundred seventeen".