216143236 has 48 divisors (see below), whose sum is σ = 421956864. Its totient is φ = 96352256.

The previous prime is 216143201. The next prime is 216143243. The reversal of 216143236 is 632341612.

216143236 is a nontrivial binomial coefficient, being equal to C(20792, 2).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

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 15 ways as a sum of consecutive naturals, for example, 176121 + ... + 177343.

It is an arithmetic number, because the mean of its divisors is an integer number (8790768).

Almost surely, 2^216143236 is an apocalyptic number.

216143236 is the 20791-st triangular number and also the 10396-th hexagonal number.

216143236 is the 6931-st centered nonagonal number.

It is an amenable number.

216143236 is a deficient number, since it is larger than the sum of its proper divisors (205813628).

216143236 is a wasteful number, since it uses less digits than its factorization.

216143236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1378 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 216143236 is about 14701.8106367889. The cubic root of 216143236 is about 600.1325966207.

Adding to 216143236 its reverse (632341612), we get a palindrome (848484848).

The spelling of 216143236 in words is "two hundred sixteen million, one hundred forty-three thousand, two hundred thirty-six".