81043296 has 24 divisors (see below), whose sum is σ = 212738904. Its totient is φ = 27014400.

The previous prime is 81043289. The next prime is 81043321. The reversal of 81043296 is 69234018.

It is a tau number, because it is divible by the number of its divisors (24).

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 3 ways as a sum of consecutive naturals, for example, 422005 + ... + 422196.

It is an arithmetic number, because the mean of its divisors is an integer number (8864121).

Almost surely, 2^81043296 is an apocalyptic number.

It is an amenable number.

81043296 is an abundant number, since it is smaller than the sum of its proper divisors (131695608).

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

81043296 is a wasteful number, since it uses less digits than its factorization.

81043296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844214 (or 844206 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 81043296 is about 9002.4050119954. The cubic root of 81043296 is about 432.7519482712.

The spelling of 81043296 in words is "eighty-one million, forty-three thousand, two hundred ninety-six".