81835056 has 40 divisors (see below), whose sum is σ = 234898160. Its totient is φ = 27278208.

The previous prime is 81835049. The next prime is 81835069. The reversal of 81835056 is 65053818.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 81835056.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94285 + ... + 95148.

It is an arithmetic number, because the mean of its divisors is an integer number (5872454).

Almost surely, 2^81835056 is an apocalyptic number.

It is an amenable number.

81835056 is an abundant number, since it is smaller than the sum of its proper divisors (153063104).

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

81835056 is a wasteful number, since it uses less digits than its factorization.

81835056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189450 (or 189438 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 81835056 is about 9046.2730447406. The cubic root of 81835056 is about 434.1566537913.

The spelling of 81835056 in words is "eighty-one million, eight hundred thirty-five thousand, fifty-six".