164531225 has 12 divisors (see below), whose sum is σ = 205928784. Its totient is φ = 130392720.

The previous prime is 164531221. The next prime is 164531243. The reversal of 164531225 is 522135461.

It is not a de Polignac number, because 164531225 - 2² = 164531221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164531221) 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 11 ways as a sum of consecutive naturals, for example, 28079 + ... + 33428.

It is an arithmetic number, because the mean of its divisors is an integer number (17160732).

Almost surely, 2^164531225 is an apocalyptic number.

It is an amenable number.

164531225 is a deficient number, since it is larger than the sum of its proper divisors (41397559).

164531225 is a wasteful number, since it uses less digits than its factorization.

164531225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61624 (or 61619 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 164531225 is about 12826.9725578564. The cubic root of 164531225 is about 547.9607403011.

Adding to 164531225 its reverse (522135461), we get a palindrome (686666686).

The spelling of 164531225 in words is "one hundred sixty-four million, five hundred thirty-one thousand, two hundred twenty-five".