81063528 has 64 divisors (see below), whose sum is σ = 249432960. Its totient is φ = 21378816.

The previous prime is 81063517. The next prime is 81063533. The reversal of 81063528 is 82536018.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16375 + ... + 20742.

It is an arithmetic number, because the mean of its divisors is an integer number (3897390).

Almost surely, 2^81063528 is an apocalyptic number.

It is an amenable number.

81063528 is an abundant number, since it is smaller than the sum of its proper divisors (168369432).

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

81063528 is a wasteful number, since it uses less digits than its factorization.

81063528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37146 (or 37142 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 81063528 is about 9003.5286415938. The cubic root of 81063528 is about 432.7879566328.

The spelling of 81063528 in words is "eighty-one million, sixty-three thousand, five hundred twenty-eight".