217265121775460 has 96 divisors (see below), whose sum is σ = 506995423482240. Its totient is φ = 77549081702400.

The previous prime is 217265121775417. The next prime is 217265121775489. The reversal of 217265121775460 is 64577121562712.

It is a junction number, because it is equal to n+sod(n) for n = 217265121775396 and 217265121775405.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39771821 + ... + 44903540.

It is an arithmetic number, because the mean of its divisors is an integer number (5281202327940).

Almost surely, 2^{217265121775460} is an apocalyptic number.

217265121775460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217265121775460 is an abundant number, since it is smaller than the sum of its proper divisors (289730301706780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217265121775460 is a wasteful number, since it uses less digits than its factorization.

217265121775460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84675597 (or 84675595 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 217265121775460 in words is "two hundred seventeen trillion, two hundred sixty-five billion, one hundred twenty-one million, seven hundred seventy-five thousand, four hundred sixty".