216747612 has 36 divisors (see below), whose sum is σ = 548687776. Its totient is φ = 72144000.

The previous prime is 216747589. The next prime is 216747617.

216747612 is nontrivially palindromic in base 10.

216747612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216747617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23028 + ... + 31044.

Almost surely, 2^216747612 is an apocalyptic number.

It is an amenable number.

216747612 is an abundant number, since it is smaller than the sum of its proper divisors (331940164).

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

216747612 is a wasteful number, since it uses less digits than its factorization.

216747612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778 (or 8773 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 216747612 is about 14722.3507633801. The cubic root of 216747612 is about 600.6914362205.

The spelling of 216747612 in words is "two hundred sixteen million, seven hundred forty-seven thousand, six hundred twelve".