165536025 has 24 divisors (see below), whose sum is σ = 280056480. Its totient is φ = 86231040.

The previous prime is 165536023. The next prime is 165536027. The reversal of 165536025 is 520635561.

It is an interprime number because it is at equal distance from previous prime (165536023) and next prime (165536027).

It is not a de Polignac number, because 165536025 - 2¹ = 165536023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165536023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22440 + ... + 28889.

It is an arithmetic number, because the mean of its divisors is an integer number (11669020).

Almost surely, 2^165536025 is an apocalyptic number.

165536025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165536025 is a deficient number, since it is larger than the sum of its proper divisors (114520455).

165536025 is a wasteful number, since it uses less digits than its factorization.

165536025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51385 (or 51380 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 165536025 is about 12866.0804054693. The cubic root of 165536025 is about 549.0739513057.

It can be divided in two parts, 16553 and 6025, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 165536025 in words is "one hundred sixty-five million, five hundred thirty-six thousand, twenty-five".