16233220 has 24 divisors (see below), whose sum is σ = 35884800. Its totient is φ = 6151392.

The previous prime is 16233199. The next prime is 16233247. The reversal of 16233220 is 2233261.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20980 + ... + 21739.

It is an arithmetic number, because the mean of its divisors is an integer number (1495200).

Almost surely, 2^16233220 is an apocalyptic number.

16233220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16233220 is an abundant number, since it is smaller than the sum of its proper divisors (19651580).

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

16233220 is a wasteful number, since it uses less digits than its factorization.

16233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42747 (or 42745 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 16233220 is about 4029.0470337289. The cubic root of 16233220 is about 253.2026372631.

Adding to 16233220 its reverse (2233261), we get a palindrome (18466481).

The spelling of 16233220 in words is "sixteen million, two hundred thirty-three thousand, two hundred twenty".