243112237551 has 6 divisors (see below), whose sum is σ = 351162120920. Its totient is φ = 162074825028.

The previous prime is 243112237547. The next prime is 243112237573. The reversal of 243112237551 is 155732211342.

243112237551 is a `hidden beast` number, since 2 + 4 + 311 + 223 + 75 + 51 = 666.

It is not a de Polignac number, because 243112237551 - 2² = 243112237547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243112237531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13506235411 + ... + 13506235428.

Almost surely, 2^243112237551 is an apocalyptic number.

243112237551 is a deficient number, since it is larger than the sum of its proper divisors (108049883369).

243112237551 is a wasteful number, since it uses less digits than its factorization.

243112237551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27012470845 (or 27012470842 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

Adding to 243112237551 its reverse (155732211342), we get a palindrome (398844448893).

The spelling of 243112237551 in words is "two hundred forty-three billion, one hundred twelve million, two hundred thirty-seven thousand, five hundred fifty-one".