164185219 has 16 divisors (see below), whose sum is σ = 181702656. Its totient is φ = 147117600.

The previous prime is 164185199. The next prime is 164185261. The reversal of 164185219 is 912581461.

It is a cyclic number.

It is not a de Polignac number, because 164185219 - 2²⁷ = 29967491 is a prime.

It is a super-2 number, since 2×164185219² = 53913572276155922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164186219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294489 + ... + 295045.

It is an arithmetic number, because the mean of its divisors is an integer number (11356416).

Almost surely, 2^164185219 is an apocalyptic number.

164185219 is a deficient number, since it is larger than the sum of its proper divisors (17517437).

164185219 is a wasteful number, since it uses less digits than its factorization.

164185219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its digits is 17280, while the sum is 37.

The square root of 164185219 is about 12813.4780212088. The cubic root of 164185219 is about 547.5763537585.

The spelling of 164185219 in words is "one hundred sixty-four million, one hundred eighty-five thousand, two hundred nineteen".