165230443 has 4 divisors (see below), whose sum is σ = 188834800. Its totient is φ = 141626088.

The previous prime is 165230423. The next prime is 165230449. The reversal of 165230443 is 344032561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344032561 = 241 ⋅1427521.

It is a cyclic number.

It is not a de Polignac number, because 165230443 - 2¹⁷ = 165099371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165230449) 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 3 ways as a sum of consecutive naturals, for example, 11802168 + ... + 11802181.

It is an arithmetic number, because the mean of its divisors is an integer number (47208700).

Almost surely, 2^165230443 is an apocalyptic number.

165230443 is a deficient number, since it is larger than the sum of its proper divisors (23604357).

165230443 is an equidigital number, since it uses as much as digits as its factorization.

165230443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23604356.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 165230443 is about 12854.1994305363. The cubic root of 165230443 is about 548.7358769237.

The spelling of 165230443 in words is "one hundred sixty-five million, two hundred thirty thousand, four hundred forty-three".