243112451338 has 4 divisors (see below), whose sum is σ = 364668677010. Its totient is φ = 121556225668.

The previous prime is 243112451321. The next prime is 243112451339. The reversal of 243112451338 is 833154211342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 833154211342 = 2 ⋅416577105671.

It can be written as a sum of positive squares in only one way, i.e., 191216422089 + 51896029249 = 437283^2 + 227807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243112451297 and 243112451306.

It is not an unprimeable number, because it can be changed into a prime (243112451339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60778112833 + ... + 60778112836.

Almost surely, 2^243112451338 is an apocalyptic number.

243112451338 is a deficient number, since it is larger than the sum of its proper divisors (121556225672).

243112451338 is a wasteful number, since it uses less digits than its factorization.

243112451338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121556225671.

The product of its digits is 69120, while the sum is 37.

The spelling of 243112451338 in words is "two hundred forty-three billion, one hundred twelve million, four hundred fifty-one thousand, three hundred thirty-eight".