81334080 has 168 divisors, whose sum is σ = 289096704. Its totient is φ = 20966400.

The previous prime is 81334073. The next prime is 81334087. The reversal of 81334080 is 8043318.

It is an interprime number because it is at equal distance from previous prime (81334073) and next prime (81334087).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81334087) 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 23 ways as a sum of consecutive naturals, for example, 88825 + ... + 89735.

Almost surely, 2^81334080 is an apocalyptic number.

81334080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81334080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144548352).

81334080 is an abundant number, since it is smaller than the sum of its proper divisors (207762624).

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

81334080 is a wasteful number, since it uses less digits than its factorization.

81334080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 81334080 is about 9018.5409019420. The cubic root of 81334080 is about 433.2689029781.

Adding to 81334080 its reverse (8043318), we get a palindrome (89377398).

The spelling of 81334080 in words is "eighty-one million, three hundred thirty-four thousand, eighty".