722221056 has 192 divisors, whose sum is σ = 2203437600. Its totient is φ = 233570304.

The previous prime is 722221039. The next prime is 722221079. The reversal of 722221056 is 650122227.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2045776 + ... + 2046128.

Almost surely, 2^722221056 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 722221056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101718800).

722221056 is an abundant number, since it is smaller than the sum of its proper divisors (1481216544).

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

722221056 is a wasteful number, since it uses less digits than its factorization.

722221056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 722221056 is about 26874.1707965102. The cubic root of 722221056 is about 897.2016190895.

The spelling of 722221056 in words is "seven hundred twenty-two million, two hundred twenty-one thousand, fifty-six".