81102 has 16 divisors (see below), whose sum is σ = 185472. Its totient is φ = 23160.

The previous prime is 81101. The next prime is 81119. The reversal of 81102 is 20118.

It is a happy number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (11592).

2⁸¹¹⁰² is an apocalyptic number.

81102 is an abundant number, since it is smaller than the sum of its proper divisors (104370).

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 (92736).

81102 is a wasteful number, since it uses less digits than its factorization.

81102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 81102 is about 284.7841287713. The cubic root of 81102 is about 43.2856411524.

Adding to 81102 its product of nonzero digits (16), we get a palindrome (81118).

The spelling of 81102 in words is "eighty-one thousand, one hundred two".