81182433 has 8 divisors (see below), whose sum is σ = 112949568. Its totient is φ = 51768464.

The previous prime is 81182411. The next prime is 81182441. The reversal of 81182433 is 33428118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81182433 - 2⁶ = 81182369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81182433.

It is not an unprimeable number, because it can be changed into a prime (81182473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588210 + ... + 588347.

It is an arithmetic number, because the mean of its divisors is an integer number (14118696).

Almost surely, 2^81182433 is an apocalyptic number.

It is an amenable number.

81182433 is a deficient number, since it is larger than the sum of its proper divisors (31767135).

81182433 is a wasteful number, since it uses less digits than its factorization.

81182433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176583.

The product of its digits is 4608, while the sum is 30.

The square root of 81182433 is about 9010.1294663284. The cubic root of 81182433 is about 432.9994595232. Note that the first 3 decimals are identical.

The spelling of 81182433 in words is "eighty-one million, one hundred eighty-two thousand, four hundred thirty-three".