164218155 has 16 divisors (see below), whose sum is σ = 271810080. Its totient is φ = 84562688.

The previous prime is 164218081. The next prime is 164218157. The reversal of 164218155 is 551812461.

164218155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 164218155 - 2⁸ = 164217899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164218157) 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, 188322 + ... + 189191.

It is an arithmetic number, because the mean of its divisors is an integer number (16988130).

Almost surely, 2^164218155 is an apocalyptic number.

164218155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164218155 is a deficient number, since it is larger than the sum of its proper divisors (107591925).

164218155 is a wasteful number, since it uses less digits than its factorization.

164218155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377550.

The product of its digits is 9600, while the sum is 33.

The square root of 164218155 is about 12814.7631659738. The cubic root of 164218155 is about 547.6129664107.

The spelling of 164218155 in words is "one hundred sixty-four million, two hundred eighteen thousand, one hundred fifty-five".