165271855 has 24 divisors (see below), whose sum is σ = 233025120. Its totient is φ = 112190400.

The previous prime is 165271853. The next prime is 165271867. The reversal of 165271855 is 558172561.

It is a happy number.

It is not a de Polignac number, because 165271855 - 2¹ = 165271853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165271853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21406 + ... + 28084.

It is an arithmetic number, because the mean of its divisors is an integer number (9709380).

Almost surely, 2^165271855 is an apocalyptic number.

165271855 is a deficient number, since it is larger than the sum of its proper divisors (67753265).

165271855 is a wasteful number, since it uses less digits than its factorization.

165271855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799 (or 6792 counting only the distinct ones).

The product of its digits is 84000, while the sum is 40.

The square root of 165271855 is about 12855.8101650577. The cubic root of 165271855 is about 548.7817166441.

The spelling of 165271855 in words is "one hundred sixty-five million, two hundred seventy-one thousand, eight hundred fifty-five".