163220000 has 60 divisors (see below), whose sum is σ = 401594886. Its totient is φ = 65280000.

The previous prime is 163219993. The next prime is 163220003. The reversal of 163220000 is 22361.

It can be written as a sum of positive squares in 5 ways, for example, as 300304 + 162919696 = 548^2 + 12764^2 .

It is not an unprimeable number, because it can be changed into a prime (163220003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15920 + ... + 24080.

Almost surely, 2^163220000 is an apocalyptic number.

163220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200797443).

163220000 is an abundant number, since it is smaller than the sum of its proper divisors (238374886).

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

163220000 is an frugal number, since it uses more digits than its factorization.

163220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8191 (or 8168 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 163220000 is about 12775.7582945201. The cubic root of 163220000 is about 546.5012057908.

Adding to 163220000 its reverse (22361), we get a palindrome (163242361).

The spelling of 163220000 in words is "one hundred sixty-three million, two hundred twenty thousand".