165351073 has 4 divisors (see below), whose sum is σ = 169384068. Its totient is φ = 161318080.

The previous prime is 165351047. The next prime is 165351077. The reversal of 165351073 is 370153561.

165351073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370153561 = 3041 ⋅121721.

It can be written as a sum of positive squares in 2 ways, for example, as 83484769 + 81866304 = 9137^2 + 9048^2 .

It is a cyclic number.

It is not a de Polignac number, because 165351073 - 2⁵ = 165351041 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165351077) 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, 2016436 + ... + 2016517.

It is an arithmetic number, because the mean of its divisors is an integer number (42346017).

Almost surely, 2^165351073 is an apocalyptic number.

It is an amenable number.

165351073 is a deficient number, since it is larger than the sum of its proper divisors (4032995).

165351073 is an equidigital number, since it uses as much as digits as its factorization.

165351073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032994.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 165351073 is about 12858.8908153075. The cubic root of 165351073 is about 548.8693832062.

The spelling of 165351073 in words is "one hundred sixty-five million, three hundred fifty-one thousand, seventy-three".