243134311215 has 32 divisors (see below), whose sum is σ = 390138420672. Its totient is φ = 129297536000.

The previous prime is 243134311171. The next prime is 243134311229. The reversal of 243134311215 is 512113431342.

It is not a de Polignac number, because 243134311215 - 2²⁷ = 243000093487 is a prime.

It is a super-2 number, since 2×243134311215² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10229245 + ... + 10252985.

It is an arithmetic number, because the mean of its divisors is an integer number (12191825646).

Almost surely, 2^243134311215 is an apocalyptic number.

243134311215 is a deficient number, since it is larger than the sum of its proper divisors (147004109457).

243134311215 is a wasteful number, since it uses less digits than its factorization.

243134311215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25691.

The product of its digits is 8640, while the sum is 30.

Adding to 243134311215 its reverse (512113431342), we get a palindrome (755247742557).

The spelling of 243134311215 in words is "two hundred forty-three billion, one hundred thirty-four million, three hundred eleven thousand, two hundred fifteen".