164612225 has 6 divisors (see below), whose sum is σ = 204119190. Its totient is φ = 131689760.

The previous prime is 164612179. The next prime is 164612237. The reversal of 164612225 is 522216461.

It can be written as a sum of positive squares in 3 ways, for example, as 1181569 + 163430656 = 1087^2 + 12784^2 .

It is a de Polignac number, because none of the positive numbers 2^k-164612225 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3292220 + ... + 3292269.

It is an arithmetic number, because the mean of its divisors is an integer number (34019865).

Almost surely, 2^164612225 is an apocalyptic number.

It is an amenable number.

164612225 is a deficient number, since it is larger than the sum of its proper divisors (39506965).

164612225 is an equidigital number, since it uses as much as digits as its factorization.

164612225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584499 (or 6584494 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 164612225 is about 12830.1295784571. The cubic root of 164612225 is about 548.0506473249.

Adding to 164612225 its reverse (522216461), we get a palindrome (686828686).

The spelling of 164612225 in words is "one hundred sixty-four million, six hundred twelve thousand, two hundred twenty-five".