165238556 has 24 divisors (see below), whose sum is σ = 341139456. Its totient is φ = 68531760.

The previous prime is 165238519. The next prime is 165238561. The reversal of 165238556 is 655832561.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94316 + ... + 96051.

It is an arithmetic number, because the mean of its divisors is an integer number (14214144).

Almost surely, 2^165238556 is an apocalyptic number.

It is an amenable number.

165238556 is an abundant number, since it is smaller than the sum of its proper divisors (175900900).

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

165238556 is a wasteful number, since it uses less digits than its factorization.

165238556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190409 (or 190407 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The square root of 165238556 is about 12854.5150044644. The cubic root of 165238556 is about 548.7448579590.

The spelling of 165238556 in words is "one hundred sixty-five million, two hundred thirty-eight thousand, five hundred fifty-six".