81175232 has 28 divisors (see below), whose sum is σ = 161534856. Its totient is φ = 40473600.

The previous prime is 81175231. The next prime is 81175261. The reversal of 81175232 is 23257118.

It is a junction number, because it is equal to n+sod(n) for n = 81175195 and 81175204.

It is not an unprimeable number, because it can be changed into a prime (81175231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24083 + ... + 27245.

It is an arithmetic number, because the mean of its divisors is an integer number (5769102).

Almost surely, 2^81175232 is an apocalyptic number.

It is an amenable number.

81175232 is a deficient number, since it is larger than the sum of its proper divisors (80359624).

81175232 is a wasteful number, since it uses less digits than its factorization.

81175232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576 (or 3566 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 81175232 is about 9009.7298516659. The cubic root of 81175232 is about 432.9866565838.

The spelling of 81175232 in words is "eighty-one million, one hundred seventy-five thousand, two hundred thirty-two".