165154220 has 48 divisors (see below), whose sum is σ = 432407808. Its totient is φ = 51476160.

The previous prime is 165154219. The next prime is 165154247. The reversal of 165154220 is 22451561.

It is a self number, because there is not a number n which added to its sum of digits gives 165154220.

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 15 ways as a sum of consecutive naturals, for example, 52082 + ... + 55161.

It is an arithmetic number, because the mean of its divisors is an integer number (9008496).

Almost surely, 2^165154220 is an apocalyptic number.

165154220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165154220 is an abundant number, since it is smaller than the sum of its proper divisors (267253588).

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

165154220 is a wasteful number, since it uses less digits than its factorization.

165154220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107270 (or 107268 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 165154220 is about 12851.2341819765. The cubic root of 165154220 is about 548.6514842268.

The spelling of 165154220 in words is "one hundred sixty-five million, one hundred fifty-four thousand, two hundred twenty".