164501225 has 48 divisors (see below), whose sum is σ = 242234496. Its totient is φ = 108480000.

The previous prime is 164501209. The next prime is 164501237. The reversal of 164501225 is 522105461.

It is not a de Polignac number, because 164501225 - 2⁴ = 164501209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 164501194 and 164501203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 724562 + ... + 724788.

It is an arithmetic number, because the mean of its divisors is an integer number (5046552).

Almost surely, 2^164501225 is an apocalyptic number.

It is an amenable number.

164501225 is a deficient number, since it is larger than the sum of its proper divisors (77733271).

164501225 is a wasteful number, since it uses less digits than its factorization.

164501225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 164501225 is about 12825.8030937638. The cubic root of 164501225 is about 547.9274339151.

Adding to 164501225 its reverse (522105461), we get a palindrome (686606686).

The spelling of 164501225 in words is "one hundred sixty-four million, five hundred one thousand, two hundred twenty-five".