216351656 has 32 divisors (see below), whose sum is σ = 430634880. Its totient is φ = 101548800.

The previous prime is 216351647. The next prime is 216351659. The reversal of 216351656 is 656153612.

It is not an unprimeable number, because it can be changed into a prime (216351659) 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 7 ways as a sum of consecutive naturals, for example, 56771 + ... + 60461.

It is an arithmetic number, because the mean of its divisors is an integer number (13457340).

Almost surely, 2^216351656 is an apocalyptic number.

It is an amenable number.

216351656 is a deficient number, since it is larger than the sum of its proper divisors (214283224).

216351656 is a wasteful number, since it uses less digits than its factorization.

216351656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145 (or 4141 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 216351656 is about 14708.8971714401. The cubic root of 216351656 is about 600.3254308667.

The spelling of 216351656 in words is "two hundred sixteen million, three hundred fifty-one thousand, six hundred fifty-six".