243142215 has 16 divisors (see below), whose sum is σ = 393400800. Its totient is φ = 128218112.

The previous prime is 243142201. The next prime is 243142243. The reversal of 243142215 is 512241342.

It is a cyclic number.

It is not a de Polignac number, because 243142215 - 2⁷ = 243142087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89730 + ... + 92399.

It is an arithmetic number, because the mean of its divisors is an integer number (24587550).

Almost surely, 2^243142215 is an apocalyptic number.

243142215 is a deficient number, since it is larger than the sum of its proper divisors (150258585).

243142215 is a wasteful number, since it uses less digits than its factorization.

243142215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182226.

The product of its digits is 1920, while the sum is 24.

The square root of 243142215 is about 15593.0181491589. The cubic root of 243142215 is about 624.1468594384.

Adding to 243142215 its reverse (512241342), we get a palindrome (755383557).

The spelling of 243142215 in words is "two hundred forty-three million, one hundred forty-two thousand, two hundred fifteen".