162203221 has 2 divisors, whose sum is σ = 162203222. Its totient is φ = 162203220.

The previous prime is 162203201. The next prime is 162203231. The reversal of 162203221 is 122302261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159516900 + 2686321 = 12630^2 + 1639^2 .

It is an emirp because it is prime and its reverse (122302261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162203221 - 2⁵ = 162203189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162203201) 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, 81101610 + 81101611.

It is an arithmetic number, because the mean of its divisors is an integer number (81101611).

Almost surely, 2^162203221 is an apocalyptic number.

It is an amenable number.

162203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

162203221 is an equidigital number, since it uses as much as digits as its factorization.

162203221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 162203221 is about 12735.9028341143. The cubic root of 162203221 is about 545.3640314041.

Adding to 162203221 its reverse (122302261), we get a palindrome (284505482).

The spelling of 162203221 in words is "one hundred sixty-two million, two hundred three thousand, two hundred twenty-one".