165481123 has 2 divisors, whose sum is σ = 165481124. Its totient is φ = 165481122.

The previous prime is 165481109. The next prime is 165481229. The reversal of 165481123 is 321184561.

165481123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165481123 - 2⁵ = 165481091 is a prime.

It is a super-2 number, since 2×165481123² = 54768004138682258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165481103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82740561 + 82740562.

It is an arithmetic number, because the mean of its divisors is an integer number (82740562).

Almost surely, 2^165481123 is an apocalyptic number.

165481123 is a deficient number, since it is larger than the sum of its proper divisors (1).

165481123 is an equidigital number, since it uses as much as digits as its factorization.

165481123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 165481123 is about 12863.9466339067. The cubic root of 165481123 is about 549.0132422821.

It can be divided in two parts, 16548 and 1123, that added together give a palindrome (17671).

The spelling of 165481123 in words is "one hundred sixty-five million, four hundred eighty-one thousand, one hundred twenty-three".