81030235271 has 2 divisors, whose sum is σ = 81030235272. Its totient is φ = 81030235270.

The previous prime is 81030235243. The next prime is 81030235291. The reversal of 81030235271 is 17253203018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81030235271 - 2⁶ = 81030235207 is a prime.

It is a super-2 number, since 2×81030235271² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81030235201) 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, 40515117635 + 40515117636.

It is an arithmetic number, because the mean of its divisors is an integer number (40515117636).

Almost surely, 2^81030235271 is an apocalyptic number.

81030235271 is a deficient number, since it is larger than the sum of its proper divisors (1).

81030235271 is an equidigital number, since it uses as much as digits as its factorization.

81030235271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 81030235271 its reverse (17253203018), we get a palindrome (98283438289).

The spelling of 81030235271 in words is "eighty-one billion, thirty million, two hundred thirty-five thousand, two hundred seventy-one".