216564314 has 4 divisors (see below), whose sum is σ = 324846474. Its totient is φ = 108282156.

The previous prime is 216564311. The next prime is 216564317. The reversal of 216564314 is 413465612.

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

It is an interprime number because it is at equal distance from previous prime (216564311) and next prime (216564317).

It can be written as a sum of positive squares in only one way, i.e., 180768025 + 35796289 = 13445^2 + 5983^2 .

It is not an unprimeable number, because it can be changed into a prime (216564311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54141077 + ... + 54141080.

Almost surely, 2^216564314 is an apocalyptic number.

216564314 is a deficient number, since it is larger than the sum of its proper divisors (108282160).

216564314 is a wasteful number, since it uses less digits than its factorization.

216564314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108282159.

The product of its digits is 17280, while the sum is 32.

The square root of 216564314 is about 14716.1242859661. The cubic root of 216564314 is about 600.5220585893.

The spelling of 216564314 in words is "two hundred sixteen million, five hundred sixty-four thousand, three hundred fourteen".