216123818 has 8 divisors (see below), whose sum is σ = 324544320. Its totient is φ = 107942380.

The previous prime is 216123799. The next prime is 216123821. The reversal of 216123818 is 818321612.

216123818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an alternating number because its digits alternate between even and odd.

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, 57488 + ... + 61131.

It is an arithmetic number, because the mean of its divisors is an integer number (40568040).

Almost surely, 2^216123818 is an apocalyptic number.

216123818 is a deficient number, since it is larger than the sum of its proper divisors (108420502).

216123818 is a wasteful number, since it uses less digits than its factorization.

216123818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119532.

The product of its digits is 4608, while the sum is 32.

The square root of 216123818 is about 14701.1502271081. The cubic root of 216123818 is about 600.1146243970.

The spelling of 216123818 in words is "two hundred sixteen million, one hundred twenty-three thousand, eight hundred eighteen".