81382314 has 64 divisors (see below), whose sum is σ = 182173824. Its totient is φ = 24074496.

The previous prime is 81382313. The next prime is 81382319. The reversal of 81382314 is 41328318.

It is not an unprimeable number, because it can be changed into a prime (81382313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 470332 + ... + 470504.

It is an arithmetic number, because the mean of its divisors is an integer number (2846466).

Almost surely, 2^81382314 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81382314, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91086912).

81382314 is an abundant number, since it is smaller than the sum of its proper divisors (100791510).

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

81382314 is a wasteful number, since it uses less digits than its factorization.

81382314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its digits is 4608, while the sum is 30.

The square root of 81382314 is about 9021.2146632258. The cubic root of 81382314 is about 433.3545340055.

The spelling of 81382314 in words is "eighty-one million, three hundred eighty-two thousand, three hundred fourteen".