81046112 has 48 divisors (see below), whose sum is σ = 190294272. Its totient is φ = 33221760.

The previous prime is 81046111. The next prime is 81046127. The reversal of 81046112 is 21164018.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046111) 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 7 ways as a sum of consecutive naturals, for example, 2714 + ... + 13017.

It is an arithmetic number, because the mean of its divisors is an integer number (3964464).

Almost surely, 2^81046112 is an apocalyptic number.

It is an amenable number.

81046112 is an abundant number, since it is smaller than the sum of its proper divisors (109248160).

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

81046112 is a wasteful number, since it uses less digits than its factorization.

81046112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15771 (or 15763 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 81046112 is about 9002.5614132868. The cubic root of 81046112 is about 432.7569604701.

The spelling of 81046112 in words is "eighty-one million, forty-six thousand, one hundred twelve".