722225651 has 12 divisors (see below), whose sum is σ = 840582648. Its totient is φ = 618724512.

The previous prime is 722225639. The next prime is 722225653. The reversal of 722225651 is 156522227.

722225651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-722225651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722225653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159815 + ... + 164271.

It is an arithmetic number, because the mean of its divisors is an integer number (70048554).

Almost surely, 2^722225651 is an apocalyptic number.

722225651 is a deficient number, since it is larger than the sum of its proper divisors (118356997).

722225651 is a wasteful number, since it uses less digits than its factorization.

722225651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778 (or 7771 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 722225651 is about 26874.2562873840. The cubic root of 722225651 is about 897.2035218461.

Adding to 722225651 its reverse (156522227), we get a palindrome (878747878).

The spelling of 722225651 in words is "seven hundred twenty-two million, two hundred twenty-five thousand, six hundred fifty-one".