81831162 has 32 divisors (see below), whose sum is σ = 191608704. Its totient is φ = 22809600.

The previous prime is 81831151. The next prime is 81831173. The reversal of 81831162 is 26113818.

It is an interprime number because it is at equal distance from previous prime (81831151) and next prime (81831173).

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 15 ways as a sum of consecutive naturals, for example, 22039 + ... + 25482.

It is an arithmetic number, because the mean of its divisors is an integer number (5987772).

Almost surely, 2^81831162 is an apocalyptic number.

81831162 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

81831162 is an abundant number, since it is smaller than the sum of its proper divisors (109777542).

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

81831162 is a wasteful number, since it uses less digits than its factorization.

81831162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47574.

The product of its digits is 2304, while the sum is 30.

The square root of 81831162 is about 9046.0578154244. The cubic root of 81831162 is about 434.1497674482.

The spelling of 81831162 in words is "eighty-one million, eight hundred thirty-one thousand, one hundred sixty-two".