165043363 has 4 divisors (see below), whose sum is σ = 166303368. Its totient is φ = 163783360.

The previous prime is 165043357. The next prime is 165043427. The reversal of 165043363 is 363340561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 363340561 = 1109 ⋅327629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165043363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165043303) 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, 629806 + ... + 630067.

It is an arithmetic number, because the mean of its divisors is an integer number (41575842).

Almost surely, 2^165043363 is an apocalyptic number.

165043363 is a deficient number, since it is larger than the sum of its proper divisors (1260005).

165043363 is a wasteful number, since it uses less digits than its factorization.

165043363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260004.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 165043363 is about 12846.9203702677. The cubic root of 165043363 is about 548.5286990482.

The spelling of 165043363 in words is "one hundred sixty-five million, forty-three thousand, three hundred sixty-three".