217330628 has 12 divisors (see below), whose sum is σ = 381479952. Its totient is φ = 108336360.

The previous prime is 217330583. The next prime is 217330639. The reversal of 217330628 is 826033712.

It is a happy number.

217330628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 217330594 and 217330603.

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, 80750 + ... + 83397.

It is an arithmetic number, because the mean of its divisors is an integer number (31789996).

Almost surely, 2^217330628 is an apocalyptic number.

It is an amenable number.

217330628 is a deficient number, since it is larger than the sum of its proper divisors (164149324).

217330628 is a wasteful number, since it uses less digits than its factorization.

217330628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164482 (or 164480 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 217330628 is about 14742.1378368268. The cubic root of 217330628 is about 601.2295416209.

The spelling of 217330628 in words is "two hundred seventeen million, three hundred thirty thousand, six hundred twenty-eight".