216143804 has 18 divisors (see below), whose sum is σ = 381165120. Its totient is φ = 107245792.

The previous prime is 216143803. The next prime is 216143819. The reversal of 216143804 is 408341612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216143803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73637 + ... + 76515.

It is an arithmetic number, because the mean of its divisors is an integer number (21175840).

Almost surely, 2^216143804 is an apocalyptic number.

It is an amenable number.

216143804 is a deficient number, since it is larger than the sum of its proper divisors (165021316).

216143804 is a wasteful number, since it uses less digits than its factorization.

216143804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 216143804 is about 14701.8299541248. The cubic root of 216143804 is about 600.1331223138.

The spelling of 216143804 in words is "two hundred sixteen million, one hundred forty-three thousand, eight hundred four".