164205231 has 4 divisors (see below), whose sum is σ = 218940312. Its totient is φ = 109470152.

The previous prime is 164205203. The next prime is 164205241. The reversal of 164205231 is 132502461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164205231 - 2¹¹ = 164203183 is a prime.

It is a super-2 number, since 2×164205231² = 53926715775526722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164205241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27367536 + ... + 27367541.

It is an arithmetic number, because the mean of its divisors is an integer number (54735078).

Almost surely, 2^164205231 is an apocalyptic number.

164205231 is a deficient number, since it is larger than the sum of its proper divisors (54735081).

164205231 is an equidigital number, since it uses as much as digits as its factorization.

164205231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54735080.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 164205231 is about 12814.2588939041. The cubic root of 164205231 is about 547.5986002857.

Adding to 164205231 its reverse (132502461), we get a palindrome (296707692).

The spelling of 164205231 in words is "one hundred sixty-four million, two hundred five thousand, two hundred thirty-one".