216865498 has 8 divisors (see below), whose sum is σ = 344433492. Its totient is φ = 102054336.

The previous prime is 216865489. The next prime is 216865511. The reversal of 216865498 is 894568612.

It can be written as a sum of positive squares in 2 ways, for example, as 216472369 + 393129 = 14713^2 + 627^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3189165 + ... + 3189232.

Almost surely, 2^216865498 is an apocalyptic number.

216865498 is a deficient number, since it is larger than the sum of its proper divisors (127567994).

216865498 is a wasteful number, since it uses less digits than its factorization.

216865498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6378416.

The product of its digits is 829440, while the sum is 49.

The square root of 216865498 is about 14726.3538596626. The cubic root of 216865498 is about 600.8003190448.

The spelling of 216865498 in words is "two hundred sixteen million, eight hundred sixty-five thousand, four hundred ninety-eight".