243421045215 has 64 divisors (see below), whose sum is σ = 408492564480. Its totient is φ = 123544192640.

The previous prime is 243421045181. The next prime is 243421045223. The reversal of 243421045215 is 512540124342.

It is not a de Polignac number, because 243421045215 - 2¹⁴ = 243421028831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98990656 + ... + 98993114.

It is an arithmetic number, because the mean of its divisors is an integer number (6382696320).

Almost surely, 2^243421045215 is an apocalyptic number.

243421045215 is a deficient number, since it is larger than the sum of its proper divisors (165071519265).

243421045215 is a wasteful number, since it uses less digits than its factorization.

243421045215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 243421045215 its reverse (512540124342), we get a palindrome (755961169557).

The spelling of 243421045215 in words is "two hundred forty-three billion, four hundred twenty-one million, forty-five thousand, two hundred fifteen".