81422227307 has 2 divisors, whose sum is σ = 81422227308. Its totient is φ = 81422227306.

The previous prime is 81422227259. The next prime is 81422227351. The reversal of 81422227307 is 70372222418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81422227307 - 2¹⁶ = 81422161771 is a prime.

It is not a weakly prime, because it can be changed into another prime (81422227387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40711113653 + 40711113654.

It is an arithmetic number, because the mean of its divisors is an integer number (40711113654).

Almost surely, 2^81422227307 is an apocalyptic number.

81422227307 is a deficient number, since it is larger than the sum of its proper divisors (1).

81422227307 is an equidigital number, since it uses as much as digits as its factorization.

81422227307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 81422227307 in words is "eighty-one billion, four hundred twenty-two million, two hundred twenty-seven thousand, three hundred seven".