217288012 has 12 divisors (see below), whose sum is σ = 383743360. Its totient is φ = 107647056.

The previous prime is 217288007. The next prime is 217288063. The reversal of 217288012 is 210882712.

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, 248748 + ... + 249619.

Almost surely, 2^217288012 is an apocalyptic number.

It is an amenable number.

217288012 is a deficient number, since it is larger than the sum of its proper divisors (166455348).

217288012 is a wasteful number, since it uses less digits than its factorization.

217288012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498480 (or 498478 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 217288012 is about 14740.6923853664. The cubic root of 217288012 is about 601.1902410196.

The spelling of 217288012 in words is "two hundred seventeen million, two hundred eighty-eight thousand, twelve".