165525365 has 16 divisors (see below), whose sum is σ = 209333376. Its totient is φ = 125400000.

The previous prime is 165525343. The next prime is 165525401. The reversal of 165525365 is 563525561.

It is not a de Polignac number, because 165525365 - 2⁸ = 165525109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4490 + ... + 18740.

It is an arithmetic number, because the mean of its divisors is an integer number (13083336).

Almost surely, 2^165525365 is an apocalyptic number.

It is an amenable number.

165525365 is a deficient number, since it is larger than the sum of its proper divisors (43808011).

165525365 is a wasteful number, since it uses less digits than its factorization.

165525365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14380.

The product of its digits is 135000, while the sum is 38.

The square root of 165525365 is about 12865.6661312192. Note that the first 3 decimals coincide. The cubic root of 165525365 is about 549.0621648402.

The spelling of 165525365 in words is "one hundred sixty-five million, five hundred twenty-five thousand, three hundred sixty-five".