164207231 has 4 divisors (see below), whose sum is σ = 164245464. Its totient is φ = 164169000.

The previous prime is 164207227. The next prime is 164207243. The reversal of 164207231 is 132702461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132702461 = 37 ⋅3586553.

It is a cyclic number.

It is not a de Polignac number, because 164207231 - 2² = 164207227 is a prime.

It is a super-2 number, since 2×164207231² = 53928029425374722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164207231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164207531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11720 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (41061366).

Almost surely, 2^164207231 is an apocalyptic number.

164207231 is a deficient number, since it is larger than the sum of its proper divisors (38233).

164207231 is an equidigital number, since it uses as much as digits as its factorization.

164207231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38232.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 164207231 is about 12814.3369317339. The cubic root of 164207231 is about 547.6008235050.

Adding to 164207231 its reverse (132702461), we get a palindrome (296909692).

The spelling of 164207231 in words is "one hundred sixty-four million, two hundred seven thousand, two hundred thirty-one".