81026271 has 16 divisors (see below), whose sum is σ = 121561600. Its totient is φ = 53332344.

The previous prime is 81026269. The next prime is 81026273. The reversal of 81026271 is 17262018.

It is an interprime number because it is at equal distance from previous prime (81026269) and next prime (81026273).

It is not a de Polignac number, because 81026271 - 2¹ = 81026269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81026273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16861 + ... + 21126.

It is an arithmetic number, because the mean of its divisors is an integer number (7597600).

Almost surely, 2^81026271 is an apocalyptic number.

81026271 is a deficient number, since it is larger than the sum of its proper divisors (40535329).

81026271 is a wasteful number, since it uses less digits than its factorization.

81026271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38075 (or 38069 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 81026271 is about 9001.4593816781. The cubic root of 81026271 is about 432.7216429971.

Adding to 81026271 its reverse (17262018), we get a palindrome (98288289).

The spelling of 81026271 in words is "eighty-one million, twenty-six thousand, two hundred seventy-one".