165535843 has 4 divisors (see below), whose sum is σ = 180584568. Its totient is φ = 150487120.

The previous prime is 165535837. The next prime is 165535873. The reversal of 165535843 is 348535561.

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 165535843 - 2¹³ = 165527651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165535796 and 165535805.

It is not an unprimeable number, because it can be changed into a prime (165535873) 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, 7524346 + ... + 7524367.

It is an arithmetic number, because the mean of its divisors is an integer number (45146142).

Almost surely, 2^165535843 is an apocalyptic number.

165535843 is a deficient number, since it is larger than the sum of its proper divisors (15048725).

165535843 is a wasteful number, since it uses less digits than its factorization.

165535843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15048724.

The product of its digits is 216000, while the sum is 40.

The square root of 165535843 is about 12866.0733326062. The cubic root of 165535843 is about 549.0737500776.

The spelling of 165535843 in words is "one hundred sixty-five million, five hundred thirty-five thousand, eight hundred forty-three".