216553828 has 12 divisors (see below), whose sum is σ = 379794492. Its totient is φ = 108041120.

The previous prime is 216553807. The next prime is 216553829. The reversal of 216553828 is 828355612.

It can be written as a sum of positive squares in 2 ways, for example, as 150749284 + 65804544 = 12278^2 + 8112^2 .

It is not an unprimeable number, because it can be changed into a prime (216553829) 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 3 ways as a sum of consecutive naturals, for example, 56875 + ... + 60562.

It is an arithmetic number, because the mean of its divisors is an integer number (31649541).

Almost surely, 2^216553828 is an apocalyptic number.

It is an amenable number.

216553828 is a deficient number, since it is larger than the sum of its proper divisors (163240664).

216553828 is a wasteful number, since it uses less digits than its factorization.

216553828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117902 (or 117900 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 216553828 is about 14715.7680057821. The cubic root of 216553828 is about 600.5123660476.

The spelling of 216553828 in words is "two hundred sixteen million, five hundred fifty-three thousand, eight hundred twenty-eight".