217136264 has 16 divisors (see below), whose sum is σ = 411163020. Its totient is φ = 107492800.

The previous prime is 217136243. The next prime is 217136267. The reversal of 217136264 is 462631712.

It can be written as a sum of positive squares in 2 ways, for example, as 145395364 + 71740900 = 12058^2 + 8470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 217136264.

It is not an unprimeable number, because it can be changed into a prime (217136267) 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 3 ways as a sum of consecutive naturals, for example, 133559 + ... + 135174.

Almost surely, 2^217136264 is an apocalyptic number.

It is an amenable number.

217136264 is a deficient number, since it is larger than the sum of its proper divisors (194026756).

217136264 is a wasteful number, since it uses less digits than its factorization.

217136264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268840 (or 268836 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 217136264 is about 14735.5442383374. The cubic root of 217136264 is about 601.0502568246.

Adding to 217136264 its reverse (462631712), we get a palindrome (679767976).

The spelling of 217136264 in words is "two hundred seventeen million, one hundred thirty-six thousand, two hundred sixty-four".