165324311 has 4 divisors (see below), whose sum is σ = 166787472. Its totient is φ = 163861152.

The previous prime is 165324287. The next prime is 165324317. The reversal of 165324311 is 113423561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113423561 = 167 ⋅679183.

It is a cyclic number.

It is not a de Polignac number, because 165324311 - 2¹⁴ = 165307927 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 (165324317) 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, 731411 + ... + 731636.

It is an arithmetic number, because the mean of its divisors is an integer number (41696868).

Almost surely, 2^165324311 is an apocalyptic number.

165324311 is a deficient number, since it is larger than the sum of its proper divisors (1463161).

165324311 is a wasteful number, since it uses less digits than its factorization.

165324311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463160.

The product of its digits is 2160, while the sum is 26.

The square root of 165324311 is about 12857.8501702267. The cubic root of 165324311 is about 548.8397701840.

Adding to 165324311 its reverse (113423561), we get a palindrome (278747872).

The spelling of 165324311 in words is "one hundred sixty-five million, three hundred twenty-four thousand, three hundred eleven".