164205425 has 6 divisors (see below), whose sum is σ = 203614758. Its totient is φ = 131364320.

The previous prime is 164205421. The next prime is 164205427. The reversal of 164205425 is 524502461.

164205425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 58081 + 164147344 = 241^2 + 12812^2 .

It is not a de Polignac number, because 164205425 - 2² = 164205421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164205421) 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, 3284084 + ... + 3284133.

It is an arithmetic number, because the mean of its divisors is an integer number (33935793).

Almost surely, 2^164205425 is an apocalyptic number.

It is an amenable number.

164205425 is a deficient number, since it is larger than the sum of its proper divisors (39409333).

164205425 is an equidigital number, since it uses as much as digits as its factorization.

164205425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6568227 (or 6568222 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 164205425 is about 12814.2664635944. The cubic root of 164205425 is about 547.5988159387.

Adding to 164205425 its reverse (524502461), we get a palindrome (688707886).

The spelling of 164205425 in words is "one hundred sixty-four million, two hundred five thousand, four hundred twenty-five".