722216 has 32 divisors (see below), whose sum is σ = 1533600. Its totient is φ = 315840.

The previous prime is 722213. The next prime is 722237. The reversal of 722216 is 612227.

It is not an unprimeable number, because it can be changed into a prime (722213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (47925).

2⁷²²²¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766800).

722216 is an abundant number, since it is smaller than the sum of its proper divisors (811384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722216 is a wasteful number, since it uses less digits than its factorization.

722216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 325 counting only the distinct ones).

The product of its digits is 336, while the sum is 20.

The square root of 722216 is about 849.8329247564. The cubic root of 722216 is about 89.7199525427.

It can be divided in two parts, 72221 and 6, that added together give a palindrome (72227).

The spelling of 722216 in words is "seven hundred twenty-two thousand, two hundred sixteen".