217852252048 has 40 divisors (see below), whose sum is σ = 435061839032. Its totient is φ = 105599490048.

The previous prime is 217852252039. The next prime is 217852252073. The reversal of 217852252048 is 840252258712.

It can be written as a sum of positive squares in 4 ways, for example, as 8062603264 + 209789648784 = 89792^2 + 458028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 217852251989 and 217852252007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500265 + ... + 828232.

Almost surely, 2^217852252048 is an apocalyptic number.

It is an amenable number.

217852252048 is a deficient number, since it is larger than the sum of its proper divisors (217209586984).

217852252048 is a wasteful number, since it uses less digits than its factorization.

217852252048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328819 (or 1328813 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 46.

The spelling of 217852252048 in words is "two hundred seventeen billion, eight hundred fifty-two million, two hundred fifty-two thousand, forty-eight".