164432431 has 2 divisors, whose sum is σ = 164432432. Its totient is φ = 164432430.

The previous prime is 164432423. The next prime is 164432459. The reversal of 164432431 is 134234461.

164432431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (164432459) can be obtained adding 164432431 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (134234461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164432431 - 2³ = 164432423 is a prime.

It is a super-3 number, since 3×164432431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 164432431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164432491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82216215 + 82216216.

It is an arithmetic number, because the mean of its divisors is an integer number (82216216).

Almost surely, 2^164432431 is an apocalyptic number.

164432431 is a deficient number, since it is larger than the sum of its proper divisors (1).

164432431 is an equidigital number, since it uses as much as digits as its factorization.

164432431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

The square root of 164432431 is about 12823.1209539644. The cubic root of 164432431 is about 547.8510426387.

Adding to 164432431 its reverse (134234461), we get a palindrome (298666892).

The spelling of 164432431 in words is "one hundred sixty-four million, four hundred thirty-two thousand, four hundred thirty-one".