165231425 has 24 divisors (see below), whose sum is σ = 215771904. Its totient is φ = 125269760.

The previous prime is 165231421. The next prime is 165231427. The reversal of 165231425 is 524132561.

165231425 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 165231425 - 2² = 165231421 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165231421) 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, 63704 + ... + 66246.

It is an arithmetic number, because the mean of its divisors is an integer number (8990496).

Almost surely, 2^165231425 is an apocalyptic number.

It is an amenable number.

165231425 is a deficient number, since it is larger than the sum of its proper divisors (50540479).

165231425 is a wasteful number, since it uses less digits than its factorization.

165231425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689 (or 2684 counting only the distinct ones).

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

The square root of 165231425 is about 12854.2376281132. The cubic root of 165231425 is about 548.7369640066.

Adding to 165231425 its reverse (524132561), we get a palindrome (689363986).

The spelling of 165231425 in words is "one hundred sixty-five million, two hundred thirty-one thousand, four hundred twenty-five".