216331331004566 has 4 divisors (see below), whose sum is σ = 324496996506852. Its totient is φ = 108165665502282.

The previous prime is 216331331004557. The next prime is 216331331004641. The reversal of 216331331004566 is 665400133133612.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54082832751140 + ... + 54082832751143.

It is an arithmetic number, because the mean of its divisors is an integer number (81124249126713).

Almost surely, 2^{216331331004566} is an apocalyptic number.

216331331004566 is a deficient number, since it is larger than the sum of its proper divisors (108165665502286).

216331331004566 is a wasteful number, since it uses less digits than its factorization.

216331331004566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108165665502285.

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 216331331004566 in words is "two hundred sixteen trillion, three hundred thirty-one billion, three hundred thirty-one million, four thousand, five hundred sixty-six".