165224443 has 2 divisors, whose sum is σ = 165224444. Its totient is φ = 165224442.

The previous prime is 165224407. The next prime is 165224459. The reversal of 165224443 is 344422561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165224443 is a prime.

It is not a weakly prime, because it can be changed into another prime (165224473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82612221 + 82612222.

It is an arithmetic number, because the mean of its divisors is an integer number (82612222).

Almost surely, 2^165224443 is an apocalyptic number.

165224443 is a deficient number, since it is larger than the sum of its proper divisors (1).

165224443 is an equidigital number, since it uses as much as digits as its factorization.

165224443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 31.

The square root of 165224443 is about 12853.9660416542. The cubic root of 165224443 is about 548.7292347758.

The spelling of 165224443 in words is "one hundred sixty-five million, two hundred twenty-four thousand, four hundred forty-three".