7220243076581 has 2 divisors, whose sum is σ = 7220243076582. Its totient is φ = 7220243076580.

The previous prime is 7220243076551. The next prime is 7220243076617. The reversal of 7220243076581 is 1856703420227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7077781368100 + 142461708481 = 2660410^2 + 377441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220243076581 is a prime.

It is a super-2 number, since 2×7220243076581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7220243076551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610121538290 + 3610121538291.

It is an arithmetic number, because the mean of its divisors is an integer number (3610121538291).

Almost surely, 2^{7220243076581} is an apocalyptic number.

It is an amenable number.

7220243076581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220243076581 is an equidigital number, since it uses as much as digits as its factorization.

7220243076581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 7220243076581 in words is "seven trillion, two hundred twenty billion, two hundred forty-three million, seventy-six thousand, five hundred eighty-one".