165509230 has 16 divisors (see below), whose sum is σ = 298597104. Its totient is φ = 66052480.

The previous prime is 165509213. The next prime is 165509233. The reversal of 165509230 is 32905561.

It is a junction number, because it is equal to n+sod(n) for n = 165509192 and 165509201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165509233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14251 + ... + 23110.

It is an arithmetic number, because the mean of its divisors is an integer number (18662319).

Almost surely, 2^165509230 is an apocalyptic number.

165509230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165509230 is a deficient number, since it is larger than the sum of its proper divisors (133087874).

165509230 is a wasteful number, since it uses less digits than its factorization.

165509230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37811.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 165509230 is about 12865.0390594044. The cubic root of 165509230 is about 549.0443238567.

The spelling of 165509230 in words is "one hundred sixty-five million, five hundred nine thousand, two hundred thirty".