216603266 has 16 divisors (see below), whose sum is σ = 356496768. Its totient is φ = 97885200.

The previous prime is 216603263. The next prime is 216603281. The reversal of 216603266 is 662306612.

216603266 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216603263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24650 + ... + 32261.

It is an arithmetic number, because the mean of its divisors is an integer number (22281048).

Almost surely, 2^216603266 is an apocalyptic number.

216603266 is a deficient number, since it is larger than the sum of its proper divisors (139893502).

216603266 is a wasteful number, since it uses less digits than its factorization.

216603266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57097.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 216603266 is about 14717.4476727454. The cubic root of 216603266 is about 600.5580604163.

Adding to 216603266 its reverse (662306612), we get a palindrome (878909878).

The spelling of 216603266 in words is "two hundred sixteen million, six hundred three thousand, two hundred sixty-six".