165343520 has 48 divisors (see below), whose sum is σ = 392241528. Its totient is φ = 65863680.

The previous prime is 165343501. The next prime is 165343537. The reversal of 165343520 is 25343561.

It can be written as a sum of positive squares in 4 ways, for example, as 139901584 + 25441936 = 11828^2 + 5044^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39110 + ... + 43130.

Almost surely, 2^165343520 is an apocalyptic number.

165343520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165343520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196120764).

165343520 is an abundant number, since it is smaller than the sum of its proper divisors (226898008).

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

165343520 is a wasteful number, since it uses less digits than its factorization.

165343520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 165343520 is about 12858.5971241034. The cubic root of 165343520 is about 548.8610258900.

The spelling of 165343520 in words is "one hundred sixty-five million, three hundred forty-three thousand, five hundred twenty".