165155111 has 8 divisors (see below), whose sum is σ = 188002944. Its totient is φ = 143612920.

The previous prime is 165155069. The next prime is 165155117. The reversal of 165155111 is 111551561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-165155111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165155117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326141 + ... + 326646.

It is an arithmetic number, because the mean of its divisors is an integer number (23500368).

Almost surely, 2^165155111 is an apocalyptic number.

165155111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165155111 is a deficient number, since it is larger than the sum of its proper divisors (22847833).

165155111 is a wasteful number, since it uses less digits than its factorization.

165155111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652821.

The product of its digits is 750, while the sum is 26.

The square root of 165155111 is about 12851.2688478609. The cubic root of 165155111 is about 548.6524708756.

The spelling of 165155111 in words is "one hundred sixty-five million, one hundred fifty-five thousand, one hundred eleven".