816541133 has 8 divisors (see below), whose sum is σ = 819557376. Its totient is φ = 813531600.

The previous prime is 816541129. The next prime is 816541151. The reversal of 816541133 is 331145618.

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 816541133 - 2² = 816541129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816541133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816541153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385748 + ... + 387858.

It is an arithmetic number, because the mean of its divisors is an integer number (102444672).

Almost surely, 2^816541133 is an apocalyptic number.

It is an amenable number.

816541133 is a deficient number, since it is larger than the sum of its proper divisors (3016243).

816541133 is a wasteful number, since it uses less digits than its factorization.

816541133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355.

The product of its digits is 8640, while the sum is 32.

The square root of 816541133 is about 28575.1838664251. The cubic root of 816541133 is about 934.6722646721.

The spelling of 816541133 in words is "eight hundred sixteen million, five hundred forty-one thousand, one hundred thirty-three".