81130 has 32 divisors (see below), whose sum is σ = 178560. Its totient is φ = 25920.

The previous prime is 81119. The next prime is 81131. The reversal of 81130 is 3118.

81130 is nontrivially palindromic in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 81130.

It is not an unprimeable number, because it can be changed into a prime (81131) 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, 1300 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (5580).

2⁸¹¹³⁰ is an apocalyptic number.

81130 is an abundant number, since it is smaller than the sum of its proper divisors (97430).

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 (89280).

81130 is a wasteful number, since it uses less digits than its factorization.

81130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 81130 is about 284.8332845719. The cubic root of 81130 is about 43.2906219523.

Adding to 81130 its reverse (3118), we get a palindrome (84248).

It can be divided in two parts, 811 and 30, that added together give a square (841 = 29²).

The spelling of 81130 in words is "eighty-one thousand, one hundred thirty".