164421311 has 2 divisors, whose sum is σ = 164421312. Its totient is φ = 164421310.

The previous prime is 164421287. The next prime is 164421401. The reversal of 164421311 is 113124461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164421311 - 2²⁶ = 97312447 is a prime.

It is a super-3 number, since 3×164421311³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164421511) 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, 82210655 + 82210656.

It is an arithmetic number, because the mean of its divisors is an integer number (82210656).

Almost surely, 2^164421311 is an apocalyptic number.

164421311 is a deficient number, since it is larger than the sum of its proper divisors (1).

164421311 is an equidigital number, since it uses as much as digits as its factorization.

164421311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 164421311 is about 12822.6873548410. The cubic root of 164421311 is about 547.8386925995.

Adding to 164421311 its reverse (113124461), we get a palindrome (277545772).

The spelling of 164421311 in words is "one hundred sixty-four million, four hundred twenty-one thousand, three hundred eleven".