165145433 has 2 divisors, whose sum is σ = 165145434. Its totient is φ = 165145432.

The previous prime is 165145427. The next prime is 165145441. The reversal of 165145433 is 334541561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85525504 + 79619929 = 9248^2 + 8923^2 .

It is an emirp because it is prime and its reverse (334541561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165145433 - 2⁶ = 165145369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165145433.

It is not a weakly prime, because it can be changed into another prime (165145423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82572716 + 82572717.

It is an arithmetic number, because the mean of its divisors is an integer number (82572717).

Almost surely, 2^165145433 is an apocalyptic number.

It is an amenable number.

165145433 is a deficient number, since it is larger than the sum of its proper divisors (1).

165145433 is an equidigital number, since it uses as much as digits as its factorization.

165145433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 165145433 is about 12850.8923036496. The cubic root of 165145433 is about 548.6417537537.

Adding to 165145433 its reverse (334541561), we get a palindrome (499686994).

The spelling of 165145433 in words is "one hundred sixty-five million, one hundred forty-five thousand, four hundred thirty-three".