165780230 has 48 divisors (see below), whose sum is σ = 378692496. Its totient is φ = 51670080.

The previous prime is 165780227. The next prime is 165780247. The reversal of 165780230 is 32087561.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 9989 + ... + 20768.

It is an arithmetic number, because the mean of its divisors is an integer number (7889427).

Almost surely, 2^165780230 is an apocalyptic number.

165780230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165780230 is an abundant number, since it is smaller than the sum of its proper divisors (212912266).

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

165780230 is a wasteful number, since it uses less digits than its factorization.

165780230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30789 (or 30782 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 165780230 is about 12875.5671719734. The cubic root of 165780230 is about 549.3438235218.

The spelling of 165780230 in words is "one hundred sixty-five million, seven hundred eighty thousand, two hundred thirty".