165225433 has 4 divisors (see below), whose sum is σ = 168342948. Its totient is φ = 162107920.

The previous prime is 165225427. The next prime is 165225451. The reversal of 165225433 is 334522561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121705024 + 43520409 = 11032^2 + 6597^2 .

It is a de Polignac number, because none of the positive numbers 2^k-165225433 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165225395 and 165225404.

It is not an unprimeable number, because it can be changed into a prime (165225833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1558678 + ... + 1558783.

It is an arithmetic number, because the mean of its divisors is an integer number (42085737).

Almost surely, 2^165225433 is an apocalyptic number.

It is an amenable number.

165225433 is a deficient number, since it is larger than the sum of its proper divisors (3117515).

165225433 is an equidigital number, since it uses as much as digits as its factorization.

165225433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117514.

The product of its digits is 21600, while the sum is 31.

The square root of 165225433 is about 12854.0045511117. The cubic root of 165225433 is about 548.7303307413.

Adding to 165225433 its reverse (334522561), we get a palindrome (499747994).

The spelling of 165225433 in words is "one hundred sixty-five million, two hundred twenty-five thousand, four hundred thirty-three".