217135530 has 24 divisors (see below), whose sum is σ = 564552612. Its totient is φ = 57902784.

The previous prime is 217135511. The next prime is 217135531. The reversal of 217135530 is 35531712.

217135530 is digitally balanced in base 3, 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 2 ways, for example, as 216884529 + 251001 = 14727^2 + 501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 217135494 and 217135503.

It is not an unprimeable number, because it can be changed into a prime (217135531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1206219 + ... + 1206398.

Almost surely, 2^217135530 is an apocalyptic number.

217135530 is an abundant number, since it is smaller than the sum of its proper divisors (347417082).

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

217135530 is a wasteful number, since it uses less digits than its factorization.

217135530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412630 (or 2412627 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 217135530 is about 14735.5193325515. The cubic root of 217135530 is about 601.0495795673.

The spelling of 217135530 in words is "two hundred seventeen million, one hundred thirty-five thousand, five hundred thirty".