165306025 has 6 divisors (see below), whose sum is σ = 204979502. Its totient is φ = 132244800.

The previous prime is 165306013. The next prime is 165306041. The reversal of 165306025 is 520603561.

It can be written as a sum of positive squares in 3 ways, for example, as 26749584 + 138556441 = 5172^2 + 11771^2 .

It is not a de Polignac number, because 165306025 - 2¹⁵ = 165273257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165305984 and 165306002.

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, 3306096 + ... + 3306145.

Almost surely, 2^165306025 is an apocalyptic number.

It is an amenable number.

165306025 is a deficient number, since it is larger than the sum of its proper divisors (39673477).

165306025 is an equidigital number, since it uses as much as digits as its factorization.

165306025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612251 (or 6612246 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 165306025 is about 12857.1390674598. The cubic root of 165306025 is about 548.8195342933.

Adding to 165306025 its reverse (520603561), we get a palindrome (685909586).

The spelling of 165306025 in words is "one hundred sixty-five million, three hundred six thousand, twenty-five".