168162321 has 16 divisors (see below), whose sum is σ = 232685568. Its totient is φ = 107912400.

The previous prime is 168162311. The next prime is 168162341. The reversal of 168162321 is 123261861.

It is not a de Polignac number, because 168162321 - 2¹⁹ = 167638033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168162311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13030 + ... + 22496.

It is an arithmetic number, because the mean of its divisors is an integer number (14542848).

Almost surely, 2^168162321 is an apocalyptic number.

It is an amenable number.

168162321 is a deficient number, since it is larger than the sum of its proper divisors (64523247).

168162321 is a wasteful number, since it uses less digits than its factorization.

168162321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9692.

The product of its digits is 3456, while the sum is 30.

The square root of 168162321 is about 12967.7415535628. The cubic root of 168162321 is about 551.9624889181.

The spelling of 168162321 in words is "one hundred sixty-eight million, one hundred sixty-two thousand, three hundred twenty-one".