165506532 has 24 divisors (see below), whose sum is σ = 386786400. Its totient is φ = 55082496.

The previous prime is 165506531. The next prime is 165506533. The reversal of 165506532 is 235605561.

It is an interprime number because it is at equal distance from previous prime (165506531) and next prime (165506533).

It is a junction number, because it is equal to n+sod(n) for n = 165506493 and 165506502.

It is not an unprimeable number, because it can be changed into a prime (165506531) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2557 + ... + 18372.

It is an arithmetic number, because the mean of its divisors is an integer number (16116100).

Almost surely, 2^165506532 is an apocalyptic number.

165506532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165506532 is an abundant number, since it is smaller than the sum of its proper divisors (221279868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165506532 is a wasteful number, since it uses less digits than its factorization.

165506532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21595 (or 21593 counting only the distinct ones).

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

The square root of 165506532 is about 12864.9342011531. The cubic root of 165506532 is about 549.0413404790.

The spelling of 165506532 in words is "one hundred sixty-five million, five hundred six thousand, five hundred thirty-two".