216615044 has 6 divisors (see below), whose sum is σ = 379076334. Its totient is φ = 108307520.

The previous prime is 216615041. The next prime is 216615059. The reversal of 216615044 is 440516612.

It can be written as a sum of positive squares in only one way, i.e., 132526144 + 84088900 = 11512^2 + 9170^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216614998 and 216615016.

It is not an unprimeable number, because it can be changed into a prime (216615041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27076877 + ... + 27076884.

It is an arithmetic number, because the mean of its divisors is an integer number (63179389).

Almost surely, 2^216615044 is an apocalyptic number.

It is an amenable number.

216615044 is a deficient number, since it is larger than the sum of its proper divisors (162461290).

216615044 is a wasteful number, since it uses less digits than its factorization.

216615044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54153765 (or 54153763 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 216615044 is about 14717.8478046214. The cubic root of 216615044 is about 600.5689455163.

The spelling of 216615044 in words is "two hundred sixteen million, six hundred fifteen thousand, forty-four".