722306641 has 16 divisors (see below), whose sum is σ = 869760000. Its totient is φ = 585981648.

The previous prime is 722306623. The next prime is 722306671. The reversal of 722306641 is 146603227.

It is not a de Polignac number, because 722306641 - 2⁵ = 722306609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722306671) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 197556 + ... + 201178.

It is an arithmetic number, because the mean of its divisors is an integer number (54360000).

Almost surely, 2^722306641 is an apocalyptic number.

It is an amenable number.

722306641 is a deficient number, since it is larger than the sum of its proper divisors (147453359).

722306641 is a wasteful number, since it uses less digits than its factorization.

722306641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 722306641 is about 26875.7630775388. The cubic root of 722306641 is about 897.2370579010.

Adding to 722306641 its reverse (146603227), we get a palindrome (868909868).

The spelling of 722306641 in words is "seven hundred twenty-two million, three hundred six thousand, six hundred forty-one".