243142216 has 8 divisors (see below), whose sum is σ = 455891670. Its totient is φ = 121571104.

The previous prime is 243142201. The next prime is 243142243. The reversal of 243142216 is 612241342.

It is a happy number.

243142216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 241678116 + 1464100 = 15546^2 + 1210^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15196381 + ... + 15196396.

Almost surely, 2^243142216 is an apocalyptic number.

It is an amenable number.

243142216 is a deficient number, since it is larger than the sum of its proper divisors (212749454).

243142216 is a wasteful number, since it uses less digits than its factorization.

243142216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30392783 (or 30392779 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 243142216 is about 15593.0181812246. The cubic root of 243142216 is about 624.1468602941.

Adding to 243142216 its reverse (612241342), we get a palindrome (855383558).

The spelling of 243142216 in words is "two hundred forty-three million, one hundred forty-two thousand, two hundred sixteen".