165111143 has 2 divisors, whose sum is σ = 165111144. Its totient is φ = 165111142.

The previous prime is 165111103. The next prime is 165111173. The reversal of 165111143 is 341111561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165111143 - 2⁸ = 165110887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165111103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82555571 + 82555572.

It is an arithmetic number, because the mean of its divisors is an integer number (82555572).

Almost surely, 2^165111143 is an apocalyptic number.

165111143 is a deficient number, since it is larger than the sum of its proper divisors (1).

165111143 is an equidigital number, since it uses as much as digits as its factorization.

165111143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 165111143 is about 12849.5580857865. The cubic root of 165111143 is about 548.6037786841.

The spelling of 165111143 in words is "one hundred sixty-five million, one hundred eleven thousand, one hundred forty-three".