243826216 has 8 divisors (see below), whose sum is σ = 457174170. Its totient is φ = 121913104.

The previous prime is 243826213. The next prime is 243826237. The reversal of 243826216 is 612628342.

It can be written as a sum of positive squares in only one way, i.e., 199656900 + 44169316 = 14130^2 + 6646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (243826213) 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 as a sum of consecutive naturals, namely, 15239131 + ... + 15239146.

Almost surely, 2^243826216 is an apocalyptic number.

It is an amenable number.

243826216 is a deficient number, since it is larger than the sum of its proper divisors (213347954).

243826216 is a wasteful number, since it uses less digits than its factorization.

243826216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30478283 (or 30478279 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 243826216 is about 15614.9356706968. The cubic root of 243826216 is about 624.7315890654.

The spelling of 243826216 in words is "two hundred forty-three million, eight hundred twenty-six thousand, two hundred sixteen".