216808612 has 6 divisors (see below), whose sum is σ = 379415078. Its totient is φ = 108404304.

The previous prime is 216808609. The next prime is 216808681.

216808612 is nontrivially palindromic in base 10.

216808612 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 187799616 + 29008996 = 13704^2 + 5386^2 .

It is a super-3 number, since 3×216808612³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27101073 + ... + 27101080.

Almost surely, 2^216808612 is an apocalyptic number.

It is an amenable number.

216808612 is a deficient number, since it is larger than the sum of its proper divisors (162606466).

216808612 is a wasteful number, since it uses less digits than its factorization.

216808612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54202157 (or 54202155 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 216808612 is about 14724.4222976659. The cubic root of 216808612 is about 600.7477824633.

The spelling of 216808612 in words is "two hundred sixteen million, eight hundred eight thousand, six hundred twelve".