165331043 has 2 divisors, whose sum is σ = 165331044. Its totient is φ = 165331042.

The previous prime is 165331037. The next prime is 165331073. The reversal of 165331043 is 340133561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165331043 - 2⁸ = 165330787 is a prime.

It is not a weakly prime, because it can be changed into another prime (165331003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82665521 + 82665522.

It is an arithmetic number, because the mean of its divisors is an integer number (82665522).

Almost surely, 2^165331043 is an apocalyptic number.

165331043 is a deficient number, since it is larger than the sum of its proper divisors (1).

165331043 is an equidigital number, since it uses as much as digits as its factorization.

165331043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 165331043 is about 12858.1119531602. Note that the first 3 decimals coincide. The cubic root of 165331043 is about 548.8472196615.

It can be divided in two parts, 16533 and 1043, that added together give a cube (17576 = 26³).

The spelling of 165331043 in words is "one hundred sixty-five million, three hundred thirty-one thousand, forty-three".