81063232 has 28 divisors (see below), whose sum is σ = 164788596. Its totient is φ = 39541760.

The previous prime is 81063223. The next prime is 81063239. The reversal of 81063232 is 23236018.

It can be written as a sum of positive squares in 2 ways, for example, as 14868736 + 66194496 = 3856^2 + 8136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81063197 and 81063206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81063239) 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, 12823 + ... + 18070.

It is an arithmetic number, because the mean of its divisors is an integer number (5885307).

Almost surely, 2^81063232 is an apocalyptic number.

81063232 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

81063232 is an abundant number, since it is smaller than the sum of its proper divisors (83725364).

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

81063232 is a wasteful number, since it uses less digits than its factorization.

81063232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30946 (or 30936 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 81063232 is about 9003.5122035792. The cubic root of 81063232 is about 432.7874298633.

The spelling of 81063232 in words is "eighty-one million, sixty-three thousand, two hundred thirty-two".