8222490081521 has 2 divisors, whose sum is σ = 8222490081522. Its totient is φ = 8222490081520.

The previous prime is 8222490081479. The next prime is 8222490081539. The reversal of 8222490081521 is 1251800942228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4744119610000 + 3478370471521 = 2178100^2 + 1865039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8222490081521 is a prime.

It is a super-2 number, since 2×8222490081521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8222490081121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4111245040760 + 4111245040761.

It is an arithmetic number, because the mean of its divisors is an integer number (4111245040761).

Almost surely, 2^{8222490081521} is an apocalyptic number.

It is an amenable number.

8222490081521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8222490081521 is an equidigital number, since it uses as much as digits as its factorization.

8222490081521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 8222490081521 in words is "eight trillion, two hundred twenty-two billion, four hundred ninety million, eighty-one thousand, five hundred twenty-one".