81014071 has 2 divisors, whose sum is σ = 81014072. Its totient is φ = 81014070.

The previous prime is 81014033. The next prime is 81014077. The reversal of 81014071 is 17041018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81014071 - 2²⁵ = 47459639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81014077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40507035 + 40507036.

It is an arithmetic number, because the mean of its divisors is an integer number (40507036).

Almost surely, 2^81014071 is an apocalyptic number.

81014071 is a deficient number, since it is larger than the sum of its proper divisors (1).

81014071 is an equidigital number, since it uses as much as digits as its factorization.

81014071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 81014071 is about 9000.7816882757. The cubic root of 81014071 is about 432.6999238313.

Adding to 81014071 its reverse (17041018), we get a palindrome (98055089).

The spelling of 81014071 in words is "eighty-one million, fourteen thousand, seventy-one".