165315025 has 6 divisors (see below), whose sum is σ = 204990662. Its totient is φ = 132252000.

The previous prime is 165314999. The next prime is 165315041. The reversal of 165315025 is 520513561.

It can be written as a sum of positive squares in 3 ways, for example, as 19219456 + 146095569 = 4384^2 + 12087^2 .

It is not a de Polignac number, because 165315025 - 2¹³ = 165306833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165314984 and 165315002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3306276 + ... + 3306325.

Almost surely, 2^165315025 is an apocalyptic number.

It is an amenable number.

165315025 is a deficient number, since it is larger than the sum of its proper divisors (39675637).

165315025 is an equidigital number, since it uses as much as digits as its factorization.

165315025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612611 (or 6612606 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 165315025 is about 12857.4890627992. The cubic root of 165315025 is about 548.8294941766.

Adding to 165315025 its reverse (520513561), we get a palindrome (685828586).

The spelling of 165315025 in words is "one hundred sixty-five million, three hundred fifteen thousand, twenty-five".