216484223 has 12 divisors (see below), whose sum is σ = 224541360. Its totient is φ = 208686720.

The previous prime is 216484193. The next prime is 216484241. The reversal of 216484223 is 322484612.

It is a de Polignac number, because none of the positive numbers 2^k-216484223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216484223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216484243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148886 + ... + 150332.

It is an arithmetic number, because the mean of its divisors is an integer number (18711780).

Almost surely, 2^216484223 is an apocalyptic number.

216484223 is a deficient number, since it is larger than the sum of its proper divisors (8057137).

216484223 is an equidigital number, since it uses as much as digits as its factorization.

216484223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618 (or 1577 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 216484223 is about 14713.4028355102. The cubic root of 216484223 is about 600.4480200098.

The spelling of 216484223 in words is "two hundred sixteen million, four hundred eighty-four thousand, two hundred twenty-three".