81041133 has 8 divisors (see below), whose sum is σ = 110690496. Its totient is φ = 52709600.

The previous prime is 81041131. The next prime is 81041143. The reversal of 81041133 is 33114018.

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

It is not a de Polignac number, because 81041133 - 2¹ = 81041131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81041131) 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, 329313 + ... + 329558.

It is an arithmetic number, because the mean of its divisors is an integer number (13836312).

Almost surely, 2^81041133 is an apocalyptic number.

It is an amenable number.

81041133 is a deficient number, since it is larger than the sum of its proper divisors (29649363).

81041133 is a wasteful number, since it uses less digits than its factorization.

81041133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658915.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 81041133 is about 9002.2848766299. The cubic root of 81041133 is about 432.7480982682.

The spelling of 81041133 in words is "eighty-one million, forty-one thousand, one hundred thirty-three".