217230634 has 4 divisors (see below), whose sum is σ = 325845954. Its totient is φ = 108615316.

The previous prime is 217230631. The next prime is 217230647. The reversal of 217230634 is 436032712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 195580225 + 21650409 = 13985^2 + 4653^2 .

It is not an unprimeable number, because it can be changed into a prime (217230631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54307657 + ... + 54307660.

Almost surely, 2^217230634 is an apocalyptic number.

217230634 is a deficient number, since it is larger than the sum of its proper divisors (108615320).

217230634 is a wasteful number, since it uses less digits than its factorization.

217230634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108615319.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 217230634 is about 14738.7460117881. The cubic root of 217230634 is about 601.1373187406.

The spelling of 217230634 in words is "two hundred seventeen million, two hundred thirty thousand, six hundred thirty-four".