165198223 has 2 divisors, whose sum is σ = 165198224. Its totient is φ = 165198222.

The previous prime is 165198211. The next prime is 165198227. The reversal of 165198223 is 322891561.

It is a strong prime.

It is an emirp because it is prime and its reverse (322891561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165198223 - 2²⁵ = 131643791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165198227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82599111 + 82599112.

It is an arithmetic number, because the mean of its divisors is an integer number (82599112).

Almost surely, 2^165198223 is an apocalyptic number.

165198223 is a deficient number, since it is larger than the sum of its proper divisors (1).

165198223 is an equidigital number, since it uses as much as digits as its factorization.

165198223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 165198223 is about 12852.9460825135. The cubic root of 165198223 is about 548.7002067026.

It can be divided in two parts, 16519 and 8223, that added together give a palindrome (24742).

The spelling of 165198223 in words is "one hundred sixty-five million, one hundred ninety-eight thousand, two hundred twenty-three".