165273523 has 8 divisors (see below), whose sum is σ = 173526480. Its totient is φ = 157190880.

The previous prime is 165273509. The next prime is 165273527. The reversal of 165273523 is 325372561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165273523 - 2¹⁷ = 165142451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165273527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40588 + ... + 44473.

It is an arithmetic number, because the mean of its divisors is an integer number (21690810).

Almost surely, 2^165273523 is an apocalyptic number.

165273523 is a deficient number, since it is larger than the sum of its proper divisors (8252957).

165273523 is an equidigital number, since it uses as much as digits as its factorization.

165273523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85157.

The product of its digits is 37800, while the sum is 34.

The square root of 165273523 is about 12855.8750382850. The cubic root of 165273523 is about 548.7835628242.

The spelling of 165273523 in words is "one hundred sixty-five million, two hundred seventy-three thousand, five hundred twenty-three".