722221172 has 6 divisors (see below), whose sum is σ = 1263887058. Its totient is φ = 361110584.

The previous prime is 722221169. The next prime is 722221189. The reversal of 722221172 is 271122227.

It can be written as a sum of positive squares in only one way, i.e., 426174736 + 296046436 = 20644^2 + 17206^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90277643 + ... + 90277650.

It is an arithmetic number, because the mean of its divisors is an integer number (210647843).

Almost surely, 2^722221172 is an apocalyptic number.

It is an amenable number.

722221172 is a deficient number, since it is larger than the sum of its proper divisors (541665886).

722221172 is a wasteful number, since it uses less digits than its factorization.

722221172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180555297 (or 180555295 counting only the distinct ones).

The product of its digits is 1568, while the sum is 26.

The square root of 722221172 is about 26874.1729547162. The cubic root of 722221172 is about 897.2016671244.

Adding to 722221172 its reverse (271122227), we get a palindrome (993343399).

The spelling of 722221172 in words is "seven hundred twenty-two million, two hundred twenty-one thousand, one hundred seventy-two".