722115221957 has 2 divisors, whose sum is σ = 722115221958. Its totient is φ = 722115221956.

The previous prime is 722115221917. The next prime is 722115222007. The reversal of 722115221957 is 759122511227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722102254756 + 12967201 = 849766^2 + 3601^2 .

It is a cyclic number.

It is not a de Polignac number, because 722115221957 - 2³² = 717820254661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722115221917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361057610978 + 361057610979.

It is an arithmetic number, because the mean of its divisors is an integer number (361057610979).

Almost surely, 2^722115221957 is an apocalyptic number.

It is an amenable number.

722115221957 is a deficient number, since it is larger than the sum of its proper divisors (1).

722115221957 is an equidigital number, since it uses as much as digits as its factorization.

722115221957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 44.

The spelling of 722115221957 in words is "seven hundred twenty-two billion, one hundred fifteen million, two hundred twenty-one thousand, nine hundred fifty-seven".