243430215 has 32 divisors (see below), whose sum is σ = 457167360. Its totient is φ = 108273024.

The previous prime is 243430211. The next prime is 243430217. The reversal of 243430215 is 512034342.

243430215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243430215 - 2² = 243430211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243430211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27445 + ... + 35214.

It is an arithmetic number, because the mean of its divisors is an integer number (14286480).

Almost surely, 2^243430215 is an apocalyptic number.

243430215 is a deficient number, since it is larger than the sum of its proper divisors (213737145).

243430215 is a wasteful number, since it uses less digits than its factorization.

243430215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62711.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 243430215 is about 15602.2503184637. The cubic root of 243430215 is about 624.3931945167.

Adding to 243430215 its reverse (512034342), we get a palindrome (755464557).

The spelling of 243430215 in words is "two hundred forty-three million, four hundred thirty thousand, two hundred fifteen".