165187055 has 16 divisors (see below), whose sum is σ = 222092064. Its totient is φ = 116887680.

The previous prime is 165187051. The next prime is 165187063. The reversal of 165187055 is 550781561.

It is a happy number.

It is not a de Polignac number, because 165187055 - 2² = 165187051 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 (165187051) 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 15 ways as a sum of consecutive naturals, for example, 38552 + ... + 42621.

It is an arithmetic number, because the mean of its divisors is an integer number (13880754).

Almost surely, 2^165187055 is an apocalyptic number.

165187055 is a deficient number, since it is larger than the sum of its proper divisors (56905009).

165187055 is a wasteful number, since it uses less digits than its factorization.

165187055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81226.

The product of its (nonzero) digits is 42000, while the sum is 38.

The square root of 165187055 is about 12852.5116222472. The cubic root of 165187055 is about 548.6878417149.

The spelling of 165187055 in words is "one hundred sixty-five million, one hundred eighty-seven thousand, fifty-five".