216996056 has 8 divisors (see below), whose sum is σ = 406867620. Its totient is φ = 108498024.

The previous prime is 216995981. The next prime is 216996079. The reversal of 216996056 is 650699612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 216995998 and 216996016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13562246 + ... + 13562261.

Almost surely, 2^216996056 is an apocalyptic number.

It is an amenable number.

216996056 is a deficient number, since it is larger than the sum of its proper divisors (189871564).

216996056 is a wasteful number, since it uses less digits than its factorization.

216996056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27124513 (or 27124509 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 216996056 is about 14730.7859939652. The cubic root of 216996056 is about 600.9208600457.

The spelling of 216996056 in words is "two hundred sixteen million, nine hundred ninety-six thousand, fifty-six".