81110532 has 24 divisors (see below), whose sum is σ = 193286016. Its totient is φ = 26461408.

The previous prime is 81110521. The next prime is 81110537. The reversal of 81110532 is 23501118.

It is a junction number, because it is equal to n+sod(n) for n = 81110499 and 81110508.

It is not an unprimeable number, because it can be changed into a prime (81110537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71343 + ... + 72470.

It is an arithmetic number, because the mean of its divisors is an integer number (8053584).

Almost surely, 2^81110532 is an apocalyptic number.

It is an amenable number.

81110532 is an abundant number, since it is smaller than the sum of its proper divisors (112175484).

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

81110532 is a wasteful number, since it uses less digits than its factorization.

81110532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143867 (or 143865 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 81110532 is about 9006.1385732177. The cubic root of 81110532 is about 432.8715899470.

The spelling of 81110532 in words is "eighty-one million, one hundred ten thousand, five hundred thirty-two".