162440221 has 2 divisors, whose sum is σ = 162440222. Its totient is φ = 162440220.

The previous prime is 162440203. The next prime is 162440233. The reversal of 162440221 is 122044261.

It is a happy number.

162440221 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., 116877721 + 45562500 = 10811^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 162440221 - 2⁵ = 162440189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 162440192 and 162440201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162440251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81220110 + 81220111.

It is an arithmetic number, because the mean of its divisors is an integer number (81220111).

Almost surely, 2^162440221 is an apocalyptic number.

It is an amenable number.

162440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

162440221 is an equidigital number, since it uses as much as digits as its factorization.

162440221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 162440221 is about 12745.2038430148. The cubic root of 162440221 is about 545.6295180669.

Adding to 162440221 its reverse (122044261), we get a palindrome (284484482).

The spelling of 162440221 in words is "one hundred sixty-two million, four hundred forty thousand, two hundred twenty-one".