216422656 has 36 divisors (see below), whose sum is σ = 445951744. Its totient is φ = 104716800.

The previous prime is 216422653. The next prime is 216422669. The reversal of 216422656 is 656224612.

It is not an unprimeable number, because it can be changed into a prime (216422653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5700 + ... + 21571.

Almost surely, 2^216422656 is an apocalyptic number.

It is an amenable number.

216422656 is an abundant number, since it is smaller than the sum of its proper divisors (229529088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216422656 is an equidigital number, since it uses as much as digits as its factorization.

216422656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27318 (or 27304 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 216422656 is about 14711.3104786759. The cubic root of 216422656 is about 600.3910931696.

The spelling of 216422656 in words is "two hundred sixteen million, four hundred twenty-two thousand, six hundred fifty-six".