165331123 has 2 divisors, whose sum is σ = 165331124. Its totient is φ = 165331122.

The previous prime is 165331109. The next prime is 165331129. The reversal of 165331123 is 321133561.

165331123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165331123 - 2⁹ = 165330611 is a prime.

It is a super-2 number, since 2×165331123² = 54668760464882258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165331129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82665561 + 82665562.

It is an arithmetic number, because the mean of its divisors is an integer number (82665562).

Almost surely, 2^165331123 is an apocalyptic number.

165331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

165331123 is an equidigital number, since it uses as much as digits as its factorization.

165331123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 165331123 is about 12858.1150640364. The cubic root of 165331123 is about 548.8473081864.

Adding to 165331123 its reverse (321133561), we get a palindrome (486464684).

The spelling of 165331123 in words is "one hundred sixty-five million, three hundred thirty-one thousand, one hundred twenty-three".