165440550 has 48 divisors (see below), whose sum is σ = 447596352. Its totient is φ = 40106400.

The previous prime is 165440537. The next prime is 165440567. The reversal of 165440550 is 55044561.

165440550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48484 + ... + 51783.

It is an arithmetic number, because the mean of its divisors is an integer number (9324924).

Almost surely, 2^165440550 is an apocalyptic number.

165440550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165440550 is an abundant number, since it is smaller than the sum of its proper divisors (282155802).

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

165440550 is a wasteful number, since it uses less digits than its factorization.

165440550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100293 (or 100288 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 165440550 is about 12862.3695328660. The cubic root of 165440550 is about 548.9683692182.

The spelling of 165440550 in words is "one hundred sixty-five million, four hundred forty thousand, five hundred fifty".