165265523 has 4 divisors (see below), whose sum is σ = 166006848. Its totient is φ = 164524200.

The previous prime is 165265453. The next prime is 165265543. The reversal of 165265523 is 325562561.

165265523 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: 325562561 = 47 ⋅6926863.

It is a cyclic number.

It is not a de Polignac number, because 165265523 - 2⁸ = 165265267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165265543) 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, 370328 + ... + 370773.

It is an arithmetic number, because the mean of its divisors is an integer number (41501712).

Almost surely, 2^165265523 is an apocalyptic number.

165265523 is a deficient number, since it is larger than the sum of its proper divisors (741325).

165265523 is an equidigital number, since it uses as much as digits as its factorization.

165265523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741324.

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

The square root of 165265523 is about 12855.5638927275. The cubic root of 165265523 is about 548.7747081304.

The spelling of 165265523 in words is "one hundred sixty-five million, two hundred sixty-five thousand, five hundred twenty-three".