163228393 has 12 divisors (see below), whose sum is σ = 168501060. Its totient is φ = 158062112.

The previous prime is 163228379. The next prime is 163228427. The reversal of 163228393 is 393822361.

It can be written as a sum of positive squares in 2 ways, for example, as 57714409 + 105513984 = 7597^2 + 10272^2 .

It is not a de Polignac number, because 163228393 - 2⁹ = 163227881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163228333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 606663 + ... + 606931.

It is an arithmetic number, because the mean of its divisors is an integer number (14041755).

Almost surely, 2^163228393 is an apocalyptic number.

It is an amenable number.

163228393 is a deficient number, since it is larger than the sum of its proper divisors (5272667).

163228393 is an equidigital number, since it uses as much as digits as its factorization.

163228393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 429 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 163228393 is about 12776.0867639508. The cubic root of 163228393 is about 546.5105729150.

The spelling of 163228393 in words is "one hundred sixty-three million, two hundred twenty-eight thousand, three hundred ninety-three".