163221336 has 48 divisors (see below), whose sum is σ = 445014960. Its totient is φ = 54043200.

The previous prime is 163221281. The next prime is 163221337. The reversal of 163221336 is 633122361.

It is a happy number.

163221336 is a `hidden beast` number, since 1 + 6 + 322 + 1 + 336 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163221337) 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, 3366 + ... + 18378.

It is an arithmetic number, because the mean of its divisors is an integer number (9271145).

Almost surely, 2^163221336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163221336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222507480).

163221336 is an abundant number, since it is smaller than the sum of its proper divisors (281793624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163221336 is a wasteful number, since it uses less digits than its factorization.

163221336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15176 (or 15169 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 163221336 is about 12775.8105809377. The cubic root of 163221336 is about 546.5026968737.

Adding to 163221336 its reverse (633122361), we get a palindrome (796343697).

The spelling of 163221336 in words is "one hundred sixty-three million, two hundred twenty-one thousand, three hundred thirty-six".