722251220 has 48 divisors (see below), whose sum is σ = 1560480768. Its totient is φ = 280640640.

The previous prime is 722251219. The next prime is 722251261. The reversal of 722251220 is 22152227.

722251220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 162062 + ... + 166458.

It is an arithmetic number, because the mean of its divisors is an integer number (32510016).

Almost surely, 2^722251220 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 722251220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780240384).

722251220 is an abundant number, since it is smaller than the sum of its proper divisors (838229548).

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

722251220 is a wasteful number, since it uses less digits than its factorization.

722251220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 722251220 is about 26874.7319986637. The cubic root of 722251220 is about 897.2141096387.

The spelling of 722251220 in words is "seven hundred twenty-two million, two hundred fifty-one thousand, two hundred twenty".