216443233044 has 36 divisors (see below), whose sum is σ = 548102708244. Its totient is φ = 72018208512.

The previous prime is 216443233031. The next prime is 216443233051. The reversal of 216443233044 is 440332344612.

216443233044 is a `hidden beast` number, since 2 + 1 + 644 + 3 + 2 + 3 + 3 + 0 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31360868100 + 185082364944 = 177090^2 + 430212^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 5376997 + ... + 5417100.

It is an arithmetic number, because the mean of its divisors is an integer number (15225075229).

Almost surely, 2^216443233044 is an apocalyptic number.

It is an amenable number.

216443233044 is an abundant number, since it is smaller than the sum of its proper divisors (331659475200).

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

216443233044 is a wasteful number, since it uses less digits than its factorization.

216443233044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794664 (or 10794659 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 216443233044 its reverse (440332344612), we get a palindrome (656775577656).

The spelling of 216443233044 in words is "two hundred sixteen billion, four hundred forty-three million, two hundred thirty-three thousand, forty-four".