164632231 has 4 divisors (see below), whose sum is σ = 164933752. Its totient is φ = 164330712.

The previous prime is 164632201. The next prime is 164632253. The reversal of 164632231 is 132236461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132236461 = 7 ⋅18890923.

It is a cyclic number.

It is not a de Polignac number, because 164632231 - 2¹¹ = 164630183 is a prime.

It is a super-2 number, since 2×164632231² = 54207542968074722, 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 164632231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164632201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149940 + ... + 151033.

It is an arithmetic number, because the mean of its divisors is an integer number (41233438).

Almost surely, 2^164632231 is an apocalyptic number.

164632231 is a deficient number, since it is larger than the sum of its proper divisors (301521).

164632231 is an equidigital number, since it uses as much as digits as its factorization.

164632231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301520.

The product of its digits is 5184, while the sum is 28.

The square root of 164632231 is about 12830.9092039497. The cubic root of 164632231 is about 548.0728487078.

Adding to 164632231 its reverse (132236461), we get a palindrome (296868692).

The spelling of 164632231 in words is "one hundred sixty-four million, six hundred thirty-two thousand, two hundred thirty-one".