81326182 has 24 divisors (see below), whose sum is σ = 142289784. Its totient is φ = 34759872.

The previous prime is 81326171. The next prime is 81326191. The reversal of 81326182 is 28162318.

It is a super-2 number, since 2×81326182² = 13227895757394248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 44878 + ... + 46654.

It is an arithmetic number, because the mean of its divisors is an integer number (5928741).

Almost surely, 2^81326182 is an apocalyptic number.

81326182 is a deficient number, since it is larger than the sum of its proper divisors (60963602).

81326182 is a wasteful number, since it uses less digits than its factorization.

81326182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260 (or 2253 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 81326182 is about 9018.1030156015. The cubic root of 81326182 is about 433.2548782357.

The spelling of 81326182 in words is "eighty-one million, three hundred twenty-six thousand, one hundred eighty-two".