81434112 has 40 divisors (see below), whose sum is σ = 216949656. Its totient is φ = 27144192.

The previous prime is 81434107. The next prime is 81434113. The reversal of 81434112 is 21143418.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81434113) 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, 24973 + ... + 28044.

Almost surely, 2^81434112 is an apocalyptic number.

It is an amenable number.

81434112 is an abundant number, since it is smaller than the sum of its proper divisors (135515544).

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

81434112 is an equidigital number, since it uses as much as digits as its factorization.

81434112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53038 (or 53022 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 81434112 is about 9024.0851059817. The cubic root of 81434112 is about 433.4464546224.

The spelling of 81434112 in words is "eighty-one million, four hundred thirty-four thousand, one hundred twelve".