165232540 has 24 divisors (see below), whose sum is σ = 378533232. Its totient is φ = 60084480.

The previous prime is 165232523. The next prime is 165232553. The reversal of 165232540 is 45232561.

165232540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165232499 and 165232508.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 375309 + ... + 375748.

It is an arithmetic number, because the mean of its divisors is an integer number (15772218).

Almost surely, 2^165232540 is an apocalyptic number.

165232540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165232540 is an abundant number, since it is smaller than the sum of its proper divisors (213300692).

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

165232540 is a wasteful number, since it uses less digits than its factorization.

165232540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751077 (or 751075 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 165232540 is about 12854.2809989513. The cubic root of 165232540 is about 548.7381983165.

The spelling of 165232540 in words is "one hundred sixty-five million, two hundred thirty-two thousand, five hundred forty".