217068672 has 32 divisors (see below), whose sum is σ = 576589680. Its totient is φ = 72356096.

The previous prime is 217068647. The next prime is 217068721. The reversal of 217068672 is 276860712.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 217068672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282258 + ... + 283025.

Almost surely, 2^217068672 is an apocalyptic number.

It is an amenable number.

217068672 is an abundant number, since it is smaller than the sum of its proper divisors (359521008).

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

217068672 is an equidigital number, since it uses as much as digits as its factorization.

217068672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565300 (or 565288 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 217068672 is about 14733.2505578369. The cubic root of 217068672 is about 600.9878836948.

The spelling of 217068672 in words is "two hundred seventeen million, sixty-eight thousand, six hundred seventy-two".