8162421321 has 8 divisors (see below), whose sum is σ = 10979540640. Its totient is φ = 5393458112.

The previous prime is 8162421251. The next prime is 8162421373. The reversal of 8162421321 is 1231242618.

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 8162421321 - 2⁹ = 8162420809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8162221321) 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, 12038631 + ... + 12039308.

It is an arithmetic number, because the mean of its divisors is an integer number (1372442580).

Almost surely, 2^8162421321 is an apocalyptic number.

It is an amenable number.

8162421321 is a deficient number, since it is larger than the sum of its proper divisors (2817119319).

8162421321 is a wasteful number, since it uses less digits than its factorization.

8162421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24078055.

The product of its digits is 4608, while the sum is 30.

The square root of 8162421321 is about 90346.1195680257. The cubic root of 8162421321 is about 2013.4445298773. Note that the first 3 decimals are identical.

Adding to 8162421321 its reverse (1231242618), we get a palindrome (9393663939).

The spelling of 8162421321 in words is "eight billion, one hundred sixty-two million, four hundred twenty-one thousand, three hundred twenty-one".