217125522015364 has 24 divisors (see below), whose sum is σ = 383462659626200. Its totient is φ = 107564798672640.

The previous prime is 217125522015361. The next prime is 217125522015377. The reversal of 217125522015364 is 463510225521712.

It can be written as a sum of positive squares in 4 ways, for example, as 2177962027264 + 214947559988100 = 1475792^2 + 14661090^2 .

It is not an unprimeable number, because it can be changed into a prime (217125522015361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19364104 + ... + 28446784.

Almost surely, 2^{217125522015364} is an apocalyptic number.

It is an amenable number.

217125522015364 is a deficient number, since it is larger than the sum of its proper divisors (166337137610836).

217125522015364 is a wasteful number, since it uses less digits than its factorization.

217125522015364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9137623 (or 9137621 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 217125522015364 in words is "two hundred seventeen trillion, one hundred twenty-five billion, five hundred twenty-two million, fifteen thousand, three hundred sixty-four".