165233111 has 2 divisors, whose sum is σ = 165233112. Its totient is φ = 165233110.

The previous prime is 165233093. The next prime is 165233113. The reversal of 165233111 is 111332561.

It is a strong prime.

It is an emirp because it is prime and its reverse (111332561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165233111 - 2¹⁰ = 165232087 is a prime.

Together with 165233113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165233113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82616555 + 82616556.

It is an arithmetic number, because the mean of its divisors is an integer number (82616556).

Almost surely, 2^165233111 is an apocalyptic number.

165233111 is a deficient number, since it is larger than the sum of its proper divisors (1).

165233111 is an equidigital number, since it uses as much as digits as its factorization.

165233111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 165233111 is about 12854.3032094315. The cubic root of 165233111 is about 548.7388304138.

Adding to 165233111 its reverse (111332561), we get a palindrome (276565672).

The spelling of 165233111 in words is "one hundred sixty-five million, two hundred thirty-three thousand, one hundred eleven".