216696814 has 4 divisors (see below), whose sum is σ = 325045224. Its totient is φ = 108348406.

The previous prime is 216696797. The next prime is 216696817. The reversal of 216696814 is 418696612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216696817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54174202 + ... + 54174205.

It is an arithmetic number, because the mean of its divisors is an integer number (81261306).

Almost surely, 2^216696814 is an apocalyptic number.

216696814 is a deficient number, since it is larger than the sum of its proper divisors (108348410).

216696814 is a wasteful number, since it uses less digits than its factorization.

216696814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108348409.

The product of its digits is 124416, while the sum is 43.

The square root of 216696814 is about 14720.6254622553. The cubic root of 216696814 is about 600.6445055878.

The spelling of 216696814 in words is "two hundred sixteen million, six hundred ninety-six thousand, eight hundred fourteen".