163640219 has 2 divisors, whose sum is σ = 163640220. Its totient is φ = 163640218.

The previous prime is 163640173. The next prime is 163640251. The reversal of 163640219 is 912046361.

It is an a-pointer prime, because the next prime (163640251) can be obtained adding 163640219 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163640219 - 2¹⁶ = 163574683 is a prime.

It is a super-2 number, since 2×163640219² = 53556242548735922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163640119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81820109 + 81820110.

It is an arithmetic number, because the mean of its divisors is an integer number (81820110).

Almost surely, 2^163640219 is an apocalyptic number.

163640219 is a deficient number, since it is larger than the sum of its proper divisors (1).

163640219 is an equidigital number, since it uses as much as digits as its factorization.

163640219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 163640219 is about 12792.1936742687. The cubic root of 163640219 is about 546.9698031629.

The spelling of 163640219 in words is "one hundred sixty-three million, six hundred forty thousand, two hundred nineteen".