81543032 has 16 divisors (see below), whose sum is σ = 153833640. Its totient is φ = 40520736.

The previous prime is 81543029. The next prime is 81543047. The reversal of 81543032 is 23034518.

It is a junction number, because it is equal to n+sod(n) for n = 81542992 and 81543010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29963 + ... + 32570.

Almost surely, 2^81543032 is an apocalyptic number.

It is an amenable number.

81543032 is a deficient number, since it is larger than the sum of its proper divisors (72290608).

81543032 is a wasteful number, since it uses less digits than its factorization.

81543032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62702 (or 62698 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 81543032 is about 9030.1180501697. The cubic root of 81543032 is about 433.6396167331.

The spelling of 81543032 in words is "eighty-one million, five hundred forty-three thousand, thirty-two".