8213048681 has 2 divisors, whose sum is σ = 8213048682. Its totient is φ = 8213048680.

The previous prime is 8213048677. The next prime is 8213048713. The reversal of 8213048681 is 1868403128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8161496281 + 51552400 = 90341^2 + 7180^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213048681 - 2² = 8213048677 is a prime.

It is a super-2 number, since 2×8213048681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8213048651) 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, 4106524340 + 4106524341.

It is an arithmetic number, because the mean of its divisors is an integer number (4106524341).

Almost surely, 2^8213048681 is an apocalyptic number.

It is an amenable number.

8213048681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213048681 is an equidigital number, since it uses as much as digits as its factorization.

8213048681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 8213048681 is about 90625.8720289079. The cubic root of 8213048681 is about 2017.5987446263.

The spelling of 8213048681 in words is "eight billion, two hundred thirteen million, forty-eight thousand, six hundred eighty-one".