216430996 has 6 divisors (see below), whose sum is σ = 378754250. Its totient is φ = 108215496.

The previous prime is 216430979. The next prime is 216430999. The reversal of 216430996 is 699034612.

It can be written as a sum of positive squares in only one way, i.e., 199092100 + 17338896 = 14110^2 + 4164^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216430999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27053871 + ... + 27053878.

Almost surely, 2^216430996 is an apocalyptic number.

It is an amenable number.

216430996 is a deficient number, since it is larger than the sum of its proper divisors (162323254).

216430996 is a wasteful number, since it uses less digits than its factorization.

216430996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54107753 (or 54107751 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 216430996 is about 14711.5939313183. The cubic root of 216430996 is about 600.3988052356.

The spelling of 216430996 in words is "two hundred sixteen million, four hundred thirty thousand, nine hundred ninety-six".