216492868 has 6 divisors (see below), whose sum is σ = 378862526. Its totient is φ = 108246432.

The previous prime is 216492853. The next prime is 216492877. The reversal of 216492868 is 868294612.

It can be written as a sum of positive squares in only one way, i.e., 111471364 + 105021504 = 10558^2 + 10248^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27061605 + ... + 27061612.

Almost surely, 2^216492868 is an apocalyptic number.

It is an amenable number.

216492868 is a deficient number, since it is larger than the sum of its proper divisors (162369658).

216492868 is a wasteful number, since it uses less digits than its factorization.

216492868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54123221 (or 54123219 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 216492868 is about 14713.6966123405. The cubic root of 216492868 is about 600.4560125923.

The spelling of 216492868 in words is "two hundred sixteen million, four hundred ninety-two thousand, eight hundred sixty-eight".