165322813 has 4 divisors (see below), whose sum is σ = 165348540. Its totient is φ = 165297088.

The previous prime is 165322799. The next prime is 165322837. The reversal of 165322813 is 318223561.

165322813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 141086884 + 24235929 = 11878^2 + 4923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165322813 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 (165322853) 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, 5883 + ... + 19111.

It is an arithmetic number, because the mean of its divisors is an integer number (41337135).

Almost surely, 2^165322813 is an apocalyptic number.

It is an amenable number.

165322813 is a deficient number, since it is larger than the sum of its proper divisors (25727).

165322813 is a wasteful number, since it uses less digits than its factorization.

165322813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25726.

The product of its digits is 8640, while the sum is 31.

The square root of 165322813 is about 12857.7919177439. The cubic root of 165322813 is about 548.8381125039.

The spelling of 165322813 in words is "one hundred sixty-five million, three hundred twenty-two thousand, eight hundred thirteen".