164304431 has 2 divisors, whose sum is σ = 164304432. Its totient is φ = 164304430.

The previous prime is 164304421. The next prime is 164304449. The reversal of 164304431 is 134403461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164304431 - 2⁶ = 164304367 is a prime.

It is a super-2 number, since 2×164304431² = 53991892092467522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164304431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164304421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82152215 + 82152216.

It is an arithmetic number, because the mean of its divisors is an integer number (82152216).

Almost surely, 2^164304431 is an apocalyptic number.

164304431 is a deficient number, since it is larger than the sum of its proper divisors (1).

164304431 is an equidigital number, since it uses as much as digits as its factorization.

164304431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 164304431 is about 12818.1289976346. The cubic root of 164304431 is about 547.7088502160.

Adding to 164304431 its reverse (134403461), we get a palindrome (298707892).

The spelling of 164304431 in words is "one hundred sixty-four million, three hundred four thousand, four hundred thirty-one".