81182231327 has 2 divisors, whose sum is σ = 81182231328. Its totient is φ = 81182231326.

The previous prime is 81182231293. The next prime is 81182231371. The reversal of 81182231327 is 72313228118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81182231327 - 2¹⁰ = 81182230303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81182234327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40591115663 + 40591115664.

It is an arithmetic number, because the mean of its divisors is an integer number (40591115664).

Almost surely, 2^81182231327 is an apocalyptic number.

81182231327 is a deficient number, since it is larger than the sum of its proper divisors (1).

81182231327 is an equidigital number, since it uses as much as digits as its factorization.

81182231327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The spelling of 81182231327 in words is "eighty-one billion, one hundred eighty-two million, two hundred thirty-one thousand, three hundred twenty-seven".