165022213 has 4 divisors (see below), whose sum is σ = 174729420. Its totient is φ = 155315008.

The previous prime is 165022189. The next prime is 165022223. The reversal of 165022213 is 312220561.

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 144528484 + 20493729 = 12022^2 + 4527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165022213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165022223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4853578 + ... + 4853611.

It is an arithmetic number, because the mean of its divisors is an integer number (43682355).

Almost surely, 2^165022213 is an apocalyptic number.

It is an amenable number.

165022213 is a deficient number, since it is larger than the sum of its proper divisors (9707207).

165022213 is an equidigital number, since it uses as much as digits as its factorization.

165022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9707206.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 165022213 is about 12846.0971894190. The cubic root of 165022213 is about 548.5052670697.

Adding to 165022213 its reverse (312220561), we get a palindrome (477242774).

The spelling of 165022213 in words is "one hundred sixty-five million, twenty-two thousand, two hundred thirteen".