8213840397331 has 2 divisors, whose sum is σ = 8213840397332. Its totient is φ = 8213840397330.

The previous prime is 8213840397241. The next prime is 8213840397379. The reversal of 8213840397331 is 1337930483128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8213840397331 - 2²⁹ = 8213303526419 is a prime.

It is a super-2 number, since 2×8213840397331² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8213840397431) 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, 4106920198665 + 4106920198666.

It is an arithmetic number, because the mean of its divisors is an integer number (4106920198666).

Almost surely, 2^{8213840397331} is an apocalyptic number.

8213840397331 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213840397331 is an equidigital number, since it uses as much as digits as its factorization.

8213840397331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 8213840397331 in words is "eight trillion, two hundred thirteen billion, eight hundred forty million, three hundred ninety-seven thousand, three hundred thirty-one".