243112427 has 4 divisors (see below), whose sum is σ = 257413176. Its totient is φ = 228811680.

The previous prime is 243112409. The next prime is 243112439. The reversal of 243112427 is 724211342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724211342 = 2 ⋅362105671.

It is a cyclic number.

It is not a de Polignac number, because 243112427 - 2²⁶ = 176003563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243112396 and 243112405.

It is not an unprimeable number, because it can be changed into a prime (243112327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7150349 + ... + 7150382.

It is an arithmetic number, because the mean of its divisors is an integer number (64353294).

Almost surely, 2^243112427 is an apocalyptic number.

243112427 is a deficient number, since it is larger than the sum of its proper divisors (14300749).

243112427 is a wasteful number, since it uses less digits than its factorization.

243112427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14300748.

The product of its digits is 2688, while the sum is 26.

The square root of 243112427 is about 15592.0629488211. The cubic root of 243112427 is about 624.1213697664.

Adding to 243112427 its reverse (724211342), we get a palindrome (967323769).

The spelling of 243112427 in words is "two hundred forty-three million, one hundred twelve thousand, four hundred twenty-seven".