216498393 has 16 divisors (see below), whose sum is σ = 322712640. Its totient is φ = 143443872.

The previous prime is 216498361. The next prime is 216498397. The reversal of 216498393 is 393894612.

It is a happy number.

216498393 is a `hidden beast` number, since 216 + 49 + 8 + 393 = 666.

216498393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216498393 - 2⁵ = 216498361 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216498397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20196 + ... + 28997.

It is an arithmetic number, because the mean of its divisors is an integer number (20169540).

Almost surely, 2^216498393 is an apocalyptic number.

It is an amenable number.

216498393 is a deficient number, since it is larger than the sum of its proper divisors (106214247).

216498393 is a wasteful number, since it uses less digits than its factorization.

216498393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49365 (or 49359 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 216498393 is about 14713.8843613779. The cubic root of 216498393 is about 600.4611205223.

The spelling of 216498393 in words is "two hundred sixteen million, four hundred ninety-eight thousand, three hundred ninety-three".