216123299 has 8 divisors (see below), whose sum is σ = 247984128. Its totient is φ = 184509000.

The previous prime is 216123293. The next prime is 216123317. The reversal of 216123299 is 992321612.

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

It is a cyclic number.

It is not a de Polignac number, because 216123299 - 2²⁰ = 215074723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216123293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59747 + ... + 63260.

It is an arithmetic number, because the mean of its divisors is an integer number (30998016).

Almost surely, 2^216123299 is an apocalyptic number.

216123299 is a deficient number, since it is larger than the sum of its proper divisors (31860829).

216123299 is a wasteful number, since it uses less digits than its factorization.

216123299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123265.

The product of its digits is 11664, while the sum is 35.

The square root of 216123299 is about 14701.1325754174. The cubic root of 216123299 is about 600.1141440246.

The spelling of 216123299 in words is "two hundred sixteen million, one hundred twenty-three thousand, two hundred ninety-nine".