168543135 has 24 divisors (see below), whose sum is σ = 292494384. Its totient is φ = 89781120.

The previous prime is 168543131. The next prime is 168543163. The reversal of 168543135 is 531345861.

It is not a de Polignac number, because 168543135 - 2² = 168543131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168543135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168543131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47379 + ... + 50811.

It is an arithmetic number, because the mean of its divisors is an integer number (12187266).

Almost surely, 2^168543135 is an apocalyptic number.

168543135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

168543135 is a deficient number, since it is larger than the sum of its proper divisors (123951249).

168543135 is a wasteful number, since it uses less digits than its factorization.

168543135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535 (or 4532 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 168543135 is about 12982.4163775470. The cubic root of 168543135 is about 552.3788258929.

Adding to 168543135 its reverse (531345861), we get a palindrome (699888996).

The spelling of 168543135 in words is "one hundred sixty-eight million, five hundred forty-three thousand, one hundred thirty-five".