81327 has 4 divisors (see below), whose sum is σ = 108440. Its totient is φ = 54216.

The previous prime is 81307. The next prime is 81331. The reversal of 81327 is 72318.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 81327 - 2⁷ = 81199 is a prime.

It is a super-2 number, since 2×81327² = 13228161858, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13552 + ... + 13557.

It is an arithmetic number, because the mean of its divisors is an integer number (27110).

2⁸¹³²⁷ is an apocalyptic number.

81327 is a deficient number, since it is larger than the sum of its proper divisors (27113).

81327 is a wasteful number, since it uses less digits than its factorization.

81327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27112.

The product of its digits is 336, while the sum is 21.

The square root of 81327 is about 285.1788912244. The cubic root of 81327 is about 43.3256330828.

Subtracting from 81327 its reverse (72318), we obtain a palindrome (9009).

The spelling of 81327 in words is "eighty-one thousand, three hundred twenty-seven".