8143317021 has 8 divisors (see below), whose sum is σ = 12408864064. Its totient is φ = 4653324000.

The previous prime is 8143316981. The next prime is 8143317037. The reversal of 8143317021 is 1207133418.

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

It is not a de Polignac number, because 8143317021 - 2¹⁰ = 8143315997 is a prime.

It is a super-2 number, since 2×8143317021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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 8143317021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8143315021) 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, 193888480 + ... + 193888521.

It is an arithmetic number, because the mean of its divisors is an integer number (1551108008).

Almost surely, 2^8143317021 is an apocalyptic number.

It is an amenable number.

8143317021 is a deficient number, since it is larger than the sum of its proper divisors (4265547043).

8143317021 is a wasteful number, since it uses less digits than its factorization.

8143317021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387777011.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8143317021 is about 90240.3292380962. The cubic root of 8143317021 is about 2011.8724678791.

The spelling of 8143317021 in words is "eight billion, one hundred forty-three million, three hundred seventeen thousand, twenty-one".