243234423515 has 16 divisors (see below), whose sum is σ = 299499681600. Its totient is φ = 189524474880.

The previous prime is 243234423511. The next prime is 243234423527. The reversal of 243234423515 is 515324432342.

It is not a de Polignac number, because 243234423515 - 2² = 243234423511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243234423511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867614 + ... + 1113203.

It is an arithmetic number, because the mean of its divisors is an integer number (18718730100).

Almost surely, 2^243234423515 is an apocalyptic number.

243234423515 is a deficient number, since it is larger than the sum of its proper divisors (56265258085).

243234423515 is a wasteful number, since it uses less digits than its factorization.

243234423515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981462.

The product of its digits is 345600, while the sum is 38.

Adding to 243234423515 its reverse (515324432342), we get a palindrome (758558855857).

The spelling of 243234423515 in words is "two hundred forty-three billion, two hundred thirty-four million, four hundred twenty-three thousand, five hundred fifteen".