216278606 has 4 divisors (see below), whose sum is σ = 324417912. Its totient is φ = 108139302.

The previous prime is 216278593. The next prime is 216278609. The reversal of 216278606 is 606872612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 216278606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216278609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54069650 + ... + 54069653.

It is an arithmetic number, because the mean of its divisors is an integer number (81104478).

Almost surely, 2^216278606 is an apocalyptic number.

216278606 is a deficient number, since it is larger than the sum of its proper divisors (108139306).

216278606 is a wasteful number, since it uses less digits than its factorization.

216278606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108139305.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 216278606 is about 14706.4137708688. The cubic root of 216278606 is about 600.2578576850.

The spelling of 216278606 in words is "two hundred sixteen million, two hundred seventy-eight thousand, six hundred six".