216422244 has 36 divisors (see below), whose sum is σ = 565934460. Its totient is φ = 69652800.

The previous prime is 216422201. The next prime is 216422329. The reversal of 216422244 is 442224612.

216422244 is a `hidden beast` number, since 216 + 422 + 24 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49702500 + 166719744 = 7050^2 + 12912^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102607 + ... + 104694.

Almost surely, 2^216422244 is an apocalyptic number.

It is an amenable number.

216422244 is an abundant number, since it is smaller than the sum of its proper divisors (349512216).

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

216422244 is a wasteful number, since it uses less digits than its factorization.

216422244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207340 (or 207335 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 216422244 is about 14711.2964758379. The cubic root of 216422244 is about 600.3907121848.

Adding to 216422244 its reverse (442224612), we get a palindrome (658646856).

The spelling of 216422244 in words is "two hundred sixteen million, four hundred twenty-two thousand, two hundred forty-four".