165219155 has 16 divisors (see below), whose sum is σ = 211053600. Its totient is φ = 123805440.

The previous prime is 165219151. The next prime is 165219157. The reversal of 165219155 is 551912561.

165219155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165219155 - 2² = 165219151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165219151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1316 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (13190850).

Almost surely, 2^165219155 is an apocalyptic number.

165219155 is a deficient number, since it is larger than the sum of its proper divisors (45834445).

165219155 is a wasteful number, since it uses less digits than its factorization.

165219155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19654.

The product of its digits is 13500, while the sum is 35.

The square root of 165219155 is about 12853.7603447396. The cubic root of 165219155 is about 548.7233806962.

The spelling of 165219155 in words is "one hundred sixty-five million, two hundred nineteen thousand, one hundred fifty-five".