217064396 has 24 divisors (see below), whose sum is σ = 383008080. Its totient is φ = 107638272.

The previous prime is 217064371. The next prime is 217064399. The reversal of 217064396 is 693460712.

It is not an unprimeable number, because it can be changed into a prime (217064399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381200 + ... + 381768.

It is an arithmetic number, because the mean of its divisors is an integer number (15958670).

Almost surely, 2^217064396 is an apocalyptic number.

It is an amenable number.

217064396 is a deficient number, since it is larger than the sum of its proper divisors (165943684).

217064396 is a wasteful number, since it uses less digits than its factorization.

217064396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 217064396 is about 14733.1054431847. The cubic root of 217064396 is about 600.9839374151.

It can be divided in two parts, 2170 and 64396, that added together give a palindrome (66566).

The spelling of 217064396 in words is "two hundred seventeen million, sixty-four thousand, three hundred ninety-six".