722215071817 has 2 divisors, whose sum is σ = 722215071818. Its totient is φ = 722215071816.

The previous prime is 722215071803. The next prime is 722215071827. The reversal of 722215071817 is 718170512227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549442667536 + 172772404281 = 741244^2 + 415659^2 .

It is a cyclic number.

It is not a de Polignac number, because 722215071817 - 2¹⁹ = 722214547529 is a prime.

It is not a weakly prime, because it can be changed into another prime (722215071827) 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, 361107535908 + 361107535909.

It is an arithmetic number, because the mean of its divisors is an integer number (361107535909).

Almost surely, 2^722215071817 is an apocalyptic number.

It is an amenable number.

722215071817 is a deficient number, since it is larger than the sum of its proper divisors (1).

722215071817 is an equidigital number, since it uses as much as digits as its factorization.

722215071817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760, while the sum is 43.

The spelling of 722215071817 in words is "seven hundred twenty-two billion, two hundred fifteen million, seventy-one thousand, eight hundred seventeen".