216404875 has 16 divisors (see below), whose sum is σ = 271818144. Its totient is φ = 172005600.

The previous prime is 216404857. The next prime is 216404879. The reversal of 216404875 is 578404612.

216404875 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 216404875 - 2¹⁷ = 216273803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216404879) 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, 14112 + ... + 25138.

It is an arithmetic number, because the mean of its divisors is an integer number (16988634).

Almost surely, 2^216404875 is an apocalyptic number.

216404875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216404875 is a deficient number, since it is larger than the sum of its proper divisors (55413269).

216404875 is a wasteful number, since it uses less digits than its factorization.

216404875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11199 (or 11189 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 216404875 is about 14710.7061353288. The cubic root of 216404875 is about 600.3746502725.

The spelling of 216404875 in words is "two hundred sixteen million, four hundred four thousand, eight hundred seventy-five".