81023012 has 12 divisors (see below), whose sum is σ = 162046080. Its totient is φ = 34724136.

The previous prime is 81023009. The next prime is 81023017. The reversal of 81023012 is 21032018.

81023012 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81023017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446812 + ... + 1446867.

It is an arithmetic number, because the mean of its divisors is an integer number (13503840).

Almost surely, 2^81023012 is an apocalyptic number.

It is an amenable number.

81023012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81023012 is a wasteful number, since it uses less digits than its factorization.

81023012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893690 (or 2893688 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 81023012 is about 9001.2783536562. The cubic root of 81023012 is about 432.7158413448.

The spelling of 81023012 in words is "eighty-one million, twenty-three thousand, twelve".