216361044 has 30 divisors (see below), whose sum is σ = 565611354. Its totient is φ = 72120240.

The previous prime is 216361039. The next prime is 216361049. The reversal of 216361044 is 440163612.

216361044 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 610 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (216361039) and next prime (216361049).

It can be written as a sum of positive squares in only one way, i.e., 202208400 + 14152644 = 14220^2 + 3762^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 216360999 and 216361017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216361049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 333567 + ... + 334214.

Almost surely, 2^216361044 is an apocalyptic number.

It is an amenable number.

216361044 is an abundant number, since it is smaller than the sum of its proper divisors (349250310).

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

216361044 is a wasteful number, since it uses less digits than its factorization.

216361044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667797 (or 667786 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 216361044 is about 14709.2162945549. The cubic root of 216361044 is about 600.3341139120.

The spelling of 216361044 in words is "two hundred sixteen million, three hundred sixty-one thousand, forty-four".