243640206222312 has 32 divisors (see below), whose sum is σ = 610341046166880. Its totient is φ = 81047997992640.

The previous prime is 243640206222263. The next prime is 243640206222379. The reversal of 243640206222312 is 213222602046342.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10337743063 + ... + 10337766630.

It is an arithmetic number, because the mean of its divisors is an integer number (19073157692715).

Almost surely, 2^{243640206222312} is an apocalyptic number.

It is an amenable number.

243640206222312 is an abundant number, since it is smaller than the sum of its proper divisors (366700839944568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243640206222312 is a wasteful number, since it uses less digits than its factorization.

243640206222312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20675510193 (or 20675510189 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 39.

Adding to 243640206222312 its reverse (213222602046342), we get a palindrome (456862808268654).

The spelling of 243640206222312 in words is "two hundred forty-three trillion, six hundred forty billion, two hundred six million, two hundred twenty-two thousand, three hundred twelve".