721222080 has 56 divisors (see below), whose sum is σ = 2289883152. Its totient is φ = 192325632.

The previous prime is 721222067. The next prime is 721222081. The reversal of 721222080 is 80222127.

It is a happy number.

721222080 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×721222080² = 1040322577359052800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 721222080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721222081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374677 + ... + 376596.

Almost surely, 2^721222080 is an apocalyptic number.

It is an amenable number.

721222080 is an abundant number, since it is smaller than the sum of its proper divisors (1568661072).

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

721222080 is a wasteful number, since it uses less digits than its factorization.

721222080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751293 (or 751283 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 721222080 is about 26855.5781915043. The cubic root of 721222080 is about 896.7877585219.

It can be divided in two parts, 7212 and 22080, that added together give a palindrome (29292).

The spelling of 721222080 in words is "seven hundred twenty-one million, two hundred twenty-two thousand, eighty".