217134764 has 24 divisors (see below), whose sum is σ = 473749248. Its totient is φ = 84597840.

The previous prime is 217134763. The next prime is 217134767. The reversal of 217134764 is 467431712.

It is not an unprimeable number, because it can be changed into a prime (217134763) 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, 352184 + ... + 352799.

It is an arithmetic number, because the mean of its divisors is an integer number (19739552).

Almost surely, 2^217134764 is an apocalyptic number.

It is an amenable number.

217134764 is an abundant number, since it is smaller than the sum of its proper divisors (256614484).

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

217134764 is a wasteful number, since it uses less digits than its factorization.

217134764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705005 (or 705003 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The square root of 217134764 is about 14735.4933409099. The cubic root of 217134764 is about 601.0488727821.

The spelling of 217134764 in words is "two hundred seventeen million, one hundred thirty-four thousand, seven hundred sixty-four".