81141271 has 2 divisors, whose sum is σ = 81141272. Its totient is φ = 81141270.

The previous prime is 81141257. The next prime is 81141283. The reversal of 81141271 is 17214118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81141271 - 2¹⁷ = 81010199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81141241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40570635 + 40570636.

It is an arithmetic number, because the mean of its divisors is an integer number (40570636).

Almost surely, 2^81141271 is an apocalyptic number.

81141271 is a deficient number, since it is larger than the sum of its proper divisors (1).

81141271 is an equidigital number, since it uses as much as digits as its factorization.

81141271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 25.

The square root of 81141271 is about 9007.8449698027. The cubic root of 81141271 is about 432.9262657864.

Adding to 81141271 its reverse (17214118), we get a palindrome (98355389).

The spelling of 81141271 in words is "eighty-one million, one hundred forty-one thousand, two hundred seventy-one".