165609230 has 16 divisors (see below), whose sum is σ = 299003184. Its totient is φ = 66042240.

The previous prime is 165609221. The next prime is 165609233. The reversal of 165609230 is 32906561.

It is a happy number.

It is a super-2 number, since 2×165609230² = 54852834122385800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165609233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21707 + ... + 28326.

It is an arithmetic number, because the mean of its divisors is an integer number (18687699).

Almost surely, 2^165609230 is an apocalyptic number.

165609230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165609230 is a deficient number, since it is larger than the sum of its proper divisors (133393954).

165609230 is a wasteful number, since it uses less digits than its factorization.

165609230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50371.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 165609230 is about 12868.9249745268. The cubic root of 165609230 is about 549.1548783726.

The spelling of 165609230 in words is "one hundred sixty-five million, six hundred nine thousand, two hundred thirty".