165018233 has 2 divisors, whose sum is σ = 165018234. Its totient is φ = 165018232.

The previous prime is 165018229. The next prime is 165018241. The reversal of 165018233 is 332810561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98644624 + 66373609 = 9932^2 + 8147^2 .

It is an emirp because it is prime and its reverse (332810561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165018233 - 2² = 165018229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165018196 and 165018205.

It is not a weakly prime, because it can be changed into another prime (165018223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82509116 + 82509117.

It is an arithmetic number, because the mean of its divisors is an integer number (82509117).

Almost surely, 2^165018233 is an apocalyptic number.

It is an amenable number.

165018233 is a deficient number, since it is larger than the sum of its proper divisors (1).

165018233 is an equidigital number, since it uses as much as digits as its factorization.

165018233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 165018233 is about 12845.9422776221. The cubic root of 165018233 is about 548.5008574240.

Adding to 165018233 its reverse (332810561), we get a palindrome (497828794).

The spelling of 165018233 in words is "one hundred sixty-five million, eighteen thousand, two hundred thirty-three".