8316021 has 8 divisors (see below), whose sum is σ = 12672064. Its totient is φ = 4752000.

The previous prime is 8316001. The next prime is 8316047. The reversal of 8316021 is 1206138.

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

It is not a de Polignac number, because 8316021 - 2⁹ = 8315509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 396001 = 8316021 / (8 + 3 + 1 + 6 + 0 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8316001) 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, 197980 + ... + 198021.

It is an arithmetic number, because the mean of its divisors is an integer number (1584008).

Almost surely, 2^8316021 is an apocalyptic number.

It is an amenable number.

8316021 is a deficient number, since it is larger than the sum of its proper divisors (4356043).

8316021 is a wasteful number, since it uses less digits than its factorization.

8316021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396011.

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

The square root of 8316021 is about 2883.7512028606. The cubic root of 8316021 is about 202.5995730389.

The spelling of 8316021 in words is "eight million, three hundred sixteen thousand, twenty-one".