163305320 has 32 divisors (see below), whose sum is σ = 371233800. Its totient is φ = 64647168.

The previous prime is 163305319. The next prime is 163305343. The reversal of 163305320 is 23503361.

163305320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 160326244 + 2979076 = 12662^2 + 1726^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 17165 + ... + 24924.

Almost surely, 2^163305320 is an apocalyptic number.

163305320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163305320 is an abundant number, since it is smaller than the sum of its proper divisors (207928480).

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

163305320 is a wasteful number, since it uses less digits than its factorization.

163305320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42197 (or 42193 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 163305320 is about 12779.0969947019. The cubic root of 163305320 is about 546.5964134057.

Adding to 163305320 its reverse (23503361), we get a palindrome (186808681).

The spelling of 163305320 in words is "one hundred sixty-three million, three hundred five thousand, three hundred twenty".