81010032 has 40 divisors (see below), whose sum is σ = 221588496. Its totient is φ = 25414656.

The previous prime is 81010003. The next prime is 81010043. The reversal of 81010032 is 23001018.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81009993 and 81010020.

It is a congruent number.

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, 48823 + ... + 50454.

Almost surely, 2^81010032 is an apocalyptic number.

It is an amenable number.

81010032 is an abundant number, since it is smaller than the sum of its proper divisors (140578464).

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

81010032 is a wasteful number, since it uses less digits than its factorization.

81010032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99305 (or 99299 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 81010032 is about 9000.5573160777. The cubic root of 81010032 is about 432.6927328828.

The spelling of 81010032 in words is "eighty-one million, ten thousand, thirty-two".