164323231 has 2 divisors, whose sum is σ = 164323232. Its totient is φ = 164323230.

The previous prime is 164323177. The next prime is 164323273. The reversal of 164323231 is 132323461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164323231 is a prime.

It is a super-2 number, since 2×164323231² = 54004248492558722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164323196 and 164323205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164323631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82161615 + 82161616.

It is an arithmetic number, because the mean of its divisors is an integer number (82161616).

Almost surely, 2^164323231 is an apocalyptic number.

164323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

164323231 is an equidigital number, since it uses as much as digits as its factorization.

164323231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 164323231 is about 12818.8623130136. The cubic root of 164323231 is about 547.7297393537.

Adding to 164323231 its reverse (132323461), we get a palindrome (296646692).

The spelling of 164323231 in words is "one hundred sixty-four million, three hundred twenty-three thousand, two hundred thirty-one".