216537796 has 6 divisors (see below), whose sum is σ = 378941150. Its totient is φ = 108268896.

The previous prime is 216537791. The next prime is 216537803. The reversal of 216537796 is 697735612.

It can be written as a sum of positive squares in only one way, i.e., 214329600 + 2208196 = 14640^2 + 1486^2 .

It is not an unprimeable number, because it can be changed into a prime (216537791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27067221 + ... + 27067228.

Almost surely, 2^216537796 is an apocalyptic number.

It is an amenable number.

216537796 is a deficient number, since it is larger than the sum of its proper divisors (162403354).

216537796 is a wasteful number, since it uses less digits than its factorization.

216537796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54134453 (or 54134451 counting only the distinct ones).

The product of its digits is 476280, while the sum is 46.

The square root of 216537796 is about 14715.2232738753. The cubic root of 216537796 is about 600.4975465576.

The spelling of 216537796 in words is "two hundred sixteen million, five hundred thirty-seven thousand, seven hundred ninety-six".