164021311 has 2 divisors, whose sum is σ = 164021312. Its totient is φ = 164021310.

The previous prime is 164021309. The next prime is 164021323. The reversal of 164021311 is 113120461.

It is a weak prime.

It is an emirp because it is prime and its reverse (113120461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164021311 - 2¹ = 164021309 is a prime.

Together with 164021309, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164021371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82010655 + 82010656.

It is an arithmetic number, because the mean of its divisors is an integer number (82010656).

Almost surely, 2^164021311 is an apocalyptic number.

164021311 is a deficient number, since it is larger than the sum of its proper divisors (1).

164021311 is an equidigital number, since it uses as much as digits as its factorization.

164021311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 164021311 is about 12807.0805025970. The cubic root of 164021311 is about 547.3940758227.

Adding to 164021311 its reverse (113120461), we get a palindrome (277141772).

The spelling of 164021311 in words is "one hundred sixty-four million, twenty-one thousand, three hundred eleven".