165552025 has 6 divisors (see below), whose sum is σ = 205284542. Its totient is φ = 132441600.

The previous prime is 165552017. The next prime is 165552031. The reversal of 165552025 is 520255561.

It can be written as a sum of positive squares in 3 ways, for example, as 1814409 + 163737616 = 1347^2 + 12796^2 .

It is not a de Polignac number, because 165552025 - 2³ = 165552017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3311016 + ... + 3311065.

Almost surely, 2^165552025 is an apocalyptic number.

It is an amenable number.

165552025 is a deficient number, since it is larger than the sum of its proper divisors (39732517).

165552025 is an equidigital number, since it uses as much as digits as its factorization.

165552025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622091 (or 6622086 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 165552025 is about 12866.7021804346. The cubic root of 165552025 is about 549.0916411111.

The spelling of 165552025 in words is "one hundred sixty-five million, five hundred fifty-two thousand, twenty-five".