165235424 has 12 divisors (see below), whose sum is σ = 325307304. Its totient is φ = 82617696.

The previous prime is 165235423. The next prime is 165235439. The reversal of 165235424 is 424532561.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 5163607 = 165235424 / (1 + 6 + 5 + 2 + 3 + 5 + 4 + 2 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165235423) 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 as a sum of consecutive naturals, namely, 2581772 + ... + 2581835.

It is an arithmetic number, because the mean of its divisors is an integer number (27108942).

Almost surely, 2^165235424 is an apocalyptic number.

It is an amenable number.

165235424 is a deficient number, since it is larger than the sum of its proper divisors (160071880).

165235424 is an equidigital number, since it uses as much as digits as its factorization.

165235424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163617 (or 5163609 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 165235424 is about 12854.3931789875. The cubic root of 165235424 is about 548.7413908913.

Adding to 165235424 its reverse (424532561), we get a palindrome (589767985).

The spelling of 165235424 in words is "one hundred sixty-five million, two hundred thirty-five thousand, four hundred twenty-four".