165112020 has 60 divisors (see below), whose sum is σ = 517967604. Its totient is φ = 44029440.

The previous prime is 165111997. The next prime is 165112037. The reversal of 165112020 is 20211561.

165112020 is a `hidden beast` number, since 1 + 651 + 12 + 0 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21399876 + 143712144 = 4626^2 + 11988^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 165111984 and 165112002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49341 + ... + 52580.

Almost surely, 2^165112020 is an apocalyptic number.

165112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165112020 is an abundant number, since it is smaller than the sum of its proper divisors (352855584).

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

165112020 is a wasteful number, since it uses less digits than its factorization.

165112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101942 (or 101931 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 165112020 is about 12849.5922114283. The cubic root of 165112020 is about 548.6047499988.

Adding to 165112020 its reverse (20211561), we get a palindrome (185323581).

The spelling of 165112020 in words is "one hundred sixty-five million, one hundred twelve thousand, twenty".