168312051 has 24 divisors (see below), whose sum is σ = 264176640. Its totient is φ = 102870000.

The previous prime is 168312049. The next prime is 168312059. The reversal of 168312051 is 150213861.

It is not a de Polignac number, because 168312051 - 2¹ = 168312049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168312059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10575 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (11007360).

Almost surely, 2^168312051 is an apocalyptic number.

168312051 is a deficient number, since it is larger than the sum of its proper divisors (95864589).

168312051 is a wasteful number, since it uses less digits than its factorization.

168312051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31807 (or 31804 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 168312051 is about 12973.5134408533. The cubic root of 168312051 is about 552.1262608940.

The spelling of 168312051 in words is "one hundred sixty-eight million, three hundred twelve thousand, fifty-one".