165164525 has 6 divisors (see below), whose sum is σ = 204804042. Its totient is φ = 132131600.

The previous prime is 165164521. The next prime is 165164551. The reversal of 165164525 is 525461561.

It can be written as a sum of positive squares in 3 ways, for example, as 56942116 + 108222409 = 7546^2 + 10403^2 .

It is not a de Polignac number, because 165164525 - 2² = 165164521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165164521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3303266 + ... + 3303315.

It is an arithmetic number, because the mean of its divisors is an integer number (34134007).

Almost surely, 2^165164525 is an apocalyptic number.

It is an amenable number.

165164525 is a deficient number, since it is larger than the sum of its proper divisors (39639517).

165164525 is an equidigital number, since it uses as much as digits as its factorization.

165164525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606591 (or 6606586 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 165164525 is about 12851.6351099773. The cubic root of 165164525 is about 548.6628952501.

The spelling of 165164525 in words is "one hundred sixty-five million, one hundred sixty-four thousand, five hundred twenty-five".