243165422137 has 16 divisors (see below), whose sum is σ = 283656536064. Its totient is φ = 205996000000.

The previous prime is 243165422119. The next prime is 243165422161. The reversal of 243165422137 is 731224561342.

It is a cyclic number.

It is not a de Polignac number, because 243165422137 - 2⁷ = 243165422009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243165422137.

It is not an unprimeable number, because it can be changed into a prime (243165422167) 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, 6418489 + ... + 6456262.

It is an arithmetic number, because the mean of its divisors is an integer number (17728533504).

Almost surely, 2^243165422137 is an apocalyptic number.

It is an amenable number.

243165422137 is a deficient number, since it is larger than the sum of its proper divisors (40491113927).

243165422137 is a wasteful number, since it uses less digits than its factorization.

243165422137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12874880.

The product of its digits is 241920, while the sum is 40.

Adding to 243165422137 its reverse (731224561342), we get a palindrome (974389983479).

The spelling of 243165422137 in words is "two hundred forty-three billion, one hundred sixty-five million, four hundred twenty-two thousand, one hundred thirty-seven".