81967182 has 16 divisors (see below), whose sum is σ = 178837632. Its totient is φ = 24838520.

The previous prime is 81967181. The next prime is 81967199. The reversal of 81967182 is 28176918.

81967182 is nontrivially palindromic in base 14.

It is a super-2 number, since 2×81967182² = 13437237850042248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81967181) 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 7 ways as a sum of consecutive naturals, for example, 620898 + ... + 621029.

It is an arithmetic number, because the mean of its divisors is an integer number (11177352).

Almost surely, 2^81967182 is an apocalyptic number.

81967182 is an abundant number, since it is smaller than the sum of its proper divisors (96870450).

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

81967182 is a wasteful number, since it uses less digits than its factorization.

81967182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241943.

The product of its digits is 48384, while the sum is 42.

The square root of 81967182 is about 9053.5728858832. The cubic root of 81967182 is about 434.3901826344.

The spelling of 81967182 in words is "eighty-one million, nine hundred sixty-seven thousand, one hundred eighty-two".