165213233 has 2 divisors, whose sum is σ = 165213234. Its totient is φ = 165213232.

The previous prime is 165213199. The next prime is 165213247. The reversal of 165213233 is 332312561.

165213233 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 can be written as a sum of positive squares in only one way, i.e., 165071104 + 142129 = 12848^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 165213233 - 2⁸ = 165212977 is a prime.

It is not a weakly prime, because it can be changed into another prime (165213533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82606616 + 82606617.

It is an arithmetic number, because the mean of its divisors is an integer number (82606617).

Almost surely, 2^165213233 is an apocalyptic number.

It is an amenable number.

165213233 is a deficient number, since it is larger than the sum of its proper divisors (1).

165213233 is an equidigital number, since it uses as much as digits as its factorization.

165213233 is an evil number, because the sum of its binary digits is even.

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

The square root of 165213233 is about 12853.5299820711. The cubic root of 165213233 is about 548.7168245986.

Adding to 165213233 its reverse (332312561), we get a palindrome (497525794).

The spelling of 165213233 in words is "one hundred sixty-five million, two hundred thirteen thousand, two hundred thirty-three".