216418323 has 16 divisors (see below), whose sum is σ = 315100800. Its totient is φ = 131033280.

The previous prime is 216418309. The next prime is 216418331. The reversal of 216418323 is 323814612.

It is not a de Polignac number, because 216418323 - 2⁶ = 216418259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216418343) 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, 38943 + ... + 44151.

It is an arithmetic number, because the mean of its divisors is an integer number (19693800).

Almost surely, 2^216418323 is an apocalyptic number.

216418323 is a deficient number, since it is larger than the sum of its proper divisors (98682477).

216418323 is a wasteful number, since it uses less digits than its factorization.

216418323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6482.

The product of its digits is 6912, while the sum is 30.

The square root of 216418323 is about 14711.1632102971. The cubic root of 216418323 is about 600.3870863310.

The spelling of 216418323 in words is "two hundred sixteen million, four hundred eighteen thousand, three hundred twenty-three".