165231330 has 64 divisors (see below), whose sum is σ = 458068608. Its totient is φ = 37698560.

The previous prime is 165231323. The next prime is 165231361. The reversal of 165231330 is 33132561.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 165231330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9117 + ... + 20336.

It is an arithmetic number, because the mean of its divisors is an integer number (7157322).

Almost surely, 2^165231330 is an apocalyptic number.

165231330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165231330 is an abundant number, since it is smaller than the sum of its proper divisors (292837278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165231330 is a wasteful number, since it uses less digits than its factorization.

165231330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29491.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 165231330 is about 12854.2339328332. The cubic root of 165231330 is about 548.7368588409.

Adding to 165231330 its reverse (33132561), we get a palindrome (198363891).

It can be divided in two parts, 165231 and 330, that added together give a palindrome (165561).

The spelling of 165231330 in words is "one hundred sixty-five million, two hundred thirty-one thousand, three hundred thirty".