217412648 has 8 divisors (see below), whose sum is σ = 407648730. Its totient is φ = 108706320.

The previous prime is 217412639. The next prime is 217412651. The reversal of 217412648 is 846214712.

217412648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 166461604 + 50951044 = 12902^2 + 7138^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13588283 + ... + 13588298.

Almost surely, 2^217412648 is an apocalyptic number.

It is an amenable number.

217412648 is a deficient number, since it is larger than the sum of its proper divisors (190236082).

217412648 is a wasteful number, since it uses less digits than its factorization.

217412648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27176587 (or 27176583 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 217412648 is about 14744.9193961853. The cubic root of 217412648 is about 601.3051662506.

It can be divided in two parts, 21741 and 2648, that added together give a cube (24389 = 29³).

The spelling of 217412648 in words is "two hundred seventeen million, four hundred twelve thousand, six hundred forty-eight".