164245225 has 6 divisors (see below), whose sum is σ = 203664110. Its totient is φ = 131396160.

The previous prime is 164245217. The next prime is 164245229. The reversal of 164245225 is 522542461.

It can be written as a sum of positive squares in 3 ways, for example, as 609961 + 163635264 = 781^2 + 12792^2 .

It is not a de Polignac number, because 164245225 - 2³ = 164245217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164245229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3284880 + ... + 3284929.

Almost surely, 2^164245225 is an apocalyptic number.

It is an amenable number.

164245225 is a deficient number, since it is larger than the sum of its proper divisors (39418885).

164245225 is an equidigital number, since it uses as much as digits as its factorization.

164245225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6569819 (or 6569814 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 164245225 is about 12815.8193261297. The cubic root of 164245225 is about 547.6430545751.

Adding to 164245225 its reverse (522542461), we get a palindrome (686787686).

The spelling of 164245225 in words is "one hundred sixty-four million, two hundred forty-five thousand, two hundred twenty-five".