165655043 has 4 divisors (see below), whose sum is σ = 165815520. Its totient is φ = 165494568.

The previous prime is 165655037. The next prime is 165655069. The reversal of 165655043 is 340556561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340556561 = 23 ⋅14806807.

It is a cyclic number.

It is not a de Polignac number, because 165655043 - 2⁴ = 165655027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165654994 and 165655012.

It is not an unprimeable number, because it can be changed into a prime (165655033) 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, 78680 + ... + 80757.

It is an arithmetic number, because the mean of its divisors is an integer number (41453880).

Almost surely, 2^165655043 is an apocalyptic number.

165655043 is a deficient number, since it is larger than the sum of its proper divisors (160477).

165655043 is a wasteful number, since it uses less digits than its factorization.

165655043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160476.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 165655043 is about 12870.7048369543. The cubic root of 165655043 is about 549.2055118486.

The spelling of 165655043 in words is "one hundred sixty-five million, six hundred fifty-five thousand, forty-three".