8541316821 has 8 divisors (see below), whose sum is σ = 11400376320. Its totient is φ = 5688234272.

The previous prime is 8541316811. The next prime is 8541316831. The reversal of 8541316821 is 1286131458.

It is an interprime number because it is at equal distance from previous prime (8541316811) and next prime (8541316831).

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 8541316821 - 2¹⁵ = 8541284053 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8541316821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8541316811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490901 + ... + 1496618.

It is an arithmetic number, because the mean of its divisors is an integer number (1425047040).

Almost surely, 2^8541316821 is an apocalyptic number.

It is an amenable number.

8541316821 is a deficient number, since it is larger than the sum of its proper divisors (2859059499).

8541316821 is a wasteful number, since it uses less digits than its factorization.

8541316821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988475.

The product of its digits is 46080, while the sum is 39.

The square root of 8541316821 is about 92419.2448627449. The cubic root of 8541316821 is about 2044.1288941974.

The spelling of 8541316821 in words is "eight billion, five hundred forty-one million, three hundred sixteen thousand, eight hundred twenty-one".