165225425 has 24 divisors (see below), whose sum is σ = 217322400. Its totient is φ = 124260480.

The previous prime is 165225421. The next prime is 165225427. The reversal of 165225425 is 524522561.

165225425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165225425 - 2² = 165225421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165225391 and 165225400.

It is not an unprimeable number, because it can be changed into a prime (165225421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63806 + ... + 66344.

It is an arithmetic number, because the mean of its divisors is an integer number (9055100).

Almost surely, 2^165225425 is an apocalyptic number.

It is an amenable number.

165225425 is a deficient number, since it is larger than the sum of its proper divisors (52096975).

165225425 is a wasteful number, since it uses less digits than its factorization.

165225425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2700 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 165225425 is about 12854.0042399246. The cubic root of 165225425 is about 548.7303218850.

Adding to 165225425 its reverse (524522561), we get a palindrome (689747986).

The spelling of 165225425 in words is "one hundred sixty-five million, two hundred twenty-five thousand, four hundred twenty-five".