216031223 has 16 divisors (see below), whose sum is σ = 236006784. Its totient is φ = 196953600.

The previous prime is 216031217. The next prime is 216031241. The reversal of 216031223 is 322130612.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216031223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216031195 and 216031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216031243) 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, 79361 + ... + 82037.

It is an arithmetic number, because the mean of its divisors is an integer number (14750424).

Almost surely, 2^216031223 is an apocalyptic number.

216031223 is a deficient number, since it is larger than the sum of its proper divisors (19975561).

216031223 is a wasteful number, since it uses less digits than its factorization.

216031223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 216031223 is about 14698.0006463464. Note that the first 3 decimals coincide. The cubic root of 216031223 is about 600.0289087923.

Adding to 216031223 its reverse (322130612), we get a palindrome (538161835).

The spelling of 216031223 in words is "two hundred sixteen million, thirty-one thousand, two hundred twenty-three".