168132321 has 16 divisors (see below), whose sum is σ = 284668800. Its totient is φ = 96075504.

The previous prime is 168132269. The next prime is 168132347. The reversal of 168132321 is 123231861.

It is a happy number.

168132321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168132321 - 2¹¹ = 168130273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (168132221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444606 + ... + 444983.

It is an arithmetic number, because the mean of its divisors is an integer number (17791800).

Almost surely, 2^168132321 is an apocalyptic number.

It is an amenable number.

168132321 is a deficient number, since it is larger than the sum of its proper divisors (116536479).

168132321 is an equidigital number, since it uses as much as digits as its factorization.

168132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889605 (or 889599 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 168132321 is about 12966.5847855170. The cubic root of 168132321 is about 551.9296637697.

The spelling of 168132321 in words is "one hundred sixty-eight million, one hundred thirty-two thousand, three hundred twenty-one".