163470221 has 2 divisors, whose sum is σ = 163470222. Its totient is φ = 163470220.

The previous prime is 163470163. The next prime is 163470227. The reversal of 163470221 is 122074361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162282121 + 1188100 = 12739^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 163470221 - 2¹⁸ = 163208077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163470227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81735110 + 81735111.

It is an arithmetic number, because the mean of its divisors is an integer number (81735111).

Almost surely, 2^163470221 is an apocalyptic number.

It is an amenable number.

163470221 is a deficient number, since it is larger than the sum of its proper divisors (1).

163470221 is an equidigital number, since it uses as much as digits as its factorization.

163470221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 163470221 is about 12785.5473484712. The cubic root of 163470221 is about 546.7803306103.

The spelling of 163470221 in words is "one hundred sixty-three million, four hundred seventy thousand, two hundred twenty-one".