168531424 has 24 divisors (see below), whose sum is σ = 332103240. Its totient is φ = 84187776.

The previous prime is 168531409. The next prime is 168531431. The reversal of 168531424 is 424135861.

It is a self number, because there is not a number n which added to its sum of digits gives 168531424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50182 + ... + 53434.

It is an arithmetic number, because the mean of its divisors is an integer number (13837635).

Almost surely, 2^168531424 is an apocalyptic number.

It is an amenable number.

168531424 is a deficient number, since it is larger than the sum of its proper divisors (163571816).

168531424 is a wasteful number, since it uses less digits than its factorization.

168531424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882 (or 4874 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 168531424 is about 12981.9653365737. The cubic root of 168531424 is about 552.3660318224.

The spelling of 168531424 in words is "one hundred sixty-eight million, five hundred thirty-one thousand, four hundred twenty-four".