216266223 has 16 divisors (see below), whose sum is σ = 298538496. Its totient is φ = 139170240.

The previous prime is 216266191. The next prime is 216266243. The reversal of 216266223 is 322662612.

It is not a de Polignac number, because 216266223 - 2⁵ = 216266191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216266243) 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, 213 + ... + 20798.

It is an arithmetic number, because the mean of its divisors is an integer number (18658656).

Almost surely, 2^216266223 is an apocalyptic number.

216266223 is a deficient number, since it is larger than the sum of its proper divisors (82272273).

216266223 is a wasteful number, since it uses less digits than its factorization.

216266223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21134.

The product of its digits is 10368, while the sum is 30.

The square root of 216266223 is about 14705.9927580562. The cubic root of 216266223 is about 600.2464015744.

The spelling of 216266223 in words is "two hundred sixteen million, two hundred sixty-six thousand, two hundred twenty-three".