216465306 has 16 divisors (see below), whose sum is σ = 434579904. Its totient is φ = 71880224.

The previous prime is 216465299. The next prime is 216465329. The reversal of 216465306 is 603564612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67011 + ... + 70166.

It is an arithmetic number, because the mean of its divisors is an integer number (27161244).

Almost surely, 2^216465306 is an apocalyptic number.

216465306 is an abundant number, since it is smaller than the sum of its proper divisors (218114598).

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

216465306 is a wasteful number, since it uses less digits than its factorization.

216465306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137445.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 216465306 is about 14712.7599722146. The cubic root of 216465306 is about 600.4305298884.

The spelling of 216465306 in words is "two hundred sixteen million, four hundred sixty-five thousand, three hundred six".