165512525 has 6 divisors (see below), whose sum is σ = 205235562. Its totient is φ = 132410000.

The previous prime is 165512513. The next prime is 165512533. The reversal of 165512525 is 525215561.

It can be written as a sum of positive squares in 3 ways, for example, as 3052009 + 162460516 = 1747^2 + 12746^2 .

It is not a de Polignac number, because 165512525 - 2⁴ = 165512509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165512491 and 165512500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3310226 + ... + 3310275.

It is an arithmetic number, because the mean of its divisors is an integer number (34205927).

Almost surely, 2^165512525 is an apocalyptic number.

It is an amenable number.

165512525 is a deficient number, since it is larger than the sum of its proper divisors (39723037).

165512525 is an equidigital number, since it uses as much as digits as its factorization.

165512525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620511 (or 6620506 counting only the distinct ones).

The product of its digits is 15000, while the sum is 32.

The square root of 165512525 is about 12865.1671190078. The cubic root of 165512525 is about 549.0479673374.

The spelling of 165512525 in words is "one hundred sixty-five million, five hundred twelve thousand, five hundred twenty-five".