81336 has 16 divisors (see below), whose sum is σ = 203400. Its totient is φ = 27104.

The previous prime is 81331. The next prime is 81343. The reversal of 81336 is 63318.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81331) by changing a digit.

81336 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671 + ... + 1718.

2⁸¹³³⁶ is an apocalyptic number.

It is an amenable number.

81336 is an abundant number, since it is smaller than the sum of its proper divisors (122064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101700).

81336 is a wasteful number, since it uses less digits than its factorization.

81336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398 (or 3394 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 81336 is about 285.1946703569. The cubic root of 81336 is about 43.3272312249.

The spelling of 81336 in words is "eighty-one thousand, three hundred thirty-six".