217607507212 has 12 divisors (see below), whose sum is σ = 380816926056. Its totient is φ = 108802671200.

The previous prime is 217607507209. The next prime is 217607507231. The reversal of 217607507212 is 212705706712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329712 + ... + 737512.

It is an arithmetic number, because the mean of its divisors is an integer number (31734743838).

Almost surely, 2^217607507212 is an apocalyptic number.

It is an amenable number.

217607507212 is a deficient number, since it is larger than the sum of its proper divisors (163209418844).

217607507212 is a wasteful number, since it uses less digits than its factorization.

217607507212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541208 (or 541206 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 217607507212 in words is "two hundred seventeen billion, six hundred seven million, five hundred seven thousand, two hundred twelve".