22143816 has 48 divisors (see below), whose sum is σ = 63133200. Its totient is φ = 6992352.

The previous prime is 22143799. The next prime is 22143829. The reversal of 22143816 is 61834122.

22143816 is a `hidden beast` number, since 221 + 438 + 1 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22143816.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6726 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (1315275).

Almost surely, 2^22143816 is an apocalyptic number.

It is an amenable number.

22143816 is an abundant number, since it is smaller than the sum of its proper divisors (40989384).

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

22143816 is a wasteful number, since it uses less digits than its factorization.

22143816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16218 (or 16211 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 22143816 is about 4705.7216237257. The cubic root of 22143816 is about 280.8131802808.

Adding to 22143816 its reverse (61834122), we get a palindrome (83977938).

The spelling of 22143816 in words is "twenty-two million, one hundred forty-three thousand, eight hundred sixteen".