165475243 has 4 divisors (see below), whose sum is σ = 165628008. Its totient is φ = 165322480.

The previous prime is 165475213. The next prime is 165475253. The reversal of 165475243 is 342574561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165475243 - 2⁹ = 165474731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165475213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74746 + ... + 76927.

It is an arithmetic number, because the mean of its divisors is an integer number (41407002).

Almost surely, 2^165475243 is an apocalyptic number.

165475243 is a deficient number, since it is larger than the sum of its proper divisors (152765).

165475243 is a wasteful number, since it uses less digits than its factorization.

165475243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152764.

The product of its digits is 100800, while the sum is 37.

The square root of 165475243 is about 12863.7180861522. The cubic root of 165475243 is about 549.0067395543.

The spelling of 165475243 in words is "one hundred sixty-five million, four hundred seventy-five thousand, two hundred forty-three".