81107334 has 96 divisors (see below), whose sum is σ = 221195520. Its totient is φ = 20865600.

The previous prime is 81107321. The next prime is 81107339. The reversal of 81107334 is 43370118.

It is a junction number, because it is equal to n+sod(n) for n = 81107298 and 81107307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81107339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192444 + ... + 192864.

It is an arithmetic number, because the mean of its divisors is an integer number (2304120).

Almost surely, 2^81107334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81107334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110597760).

81107334 is an abundant number, since it is smaller than the sum of its proper divisors (140088186).

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

81107334 is a wasteful number, since it uses less digits than its factorization.

81107334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 81107334 is about 9005.9610258983. The cubic root of 81107334 is about 432.8659008316.

The spelling of 81107334 in words is "eighty-one million, one hundred seven thousand, three hundred thirty-four".