243115412143 has 4 divisors (see below), whose sum is σ = 243164941480. Its totient is φ = 243065882808.

The previous prime is 243115412131. The next prime is 243115412167. The reversal of 243115412143 is 341214511342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243115412143 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 (243115412173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24757305 + ... + 24767122.

It is an arithmetic number, because the mean of its divisors is an integer number (60791235370).

Almost surely, 2^243115412143 is an apocalyptic number.

243115412143 is a deficient number, since it is larger than the sum of its proper divisors (49529337).

243115412143 is an equidigital number, since it uses as much as digits as its factorization.

243115412143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49529336.

The product of its digits is 11520, while the sum is 31.

Adding to 243115412143 its reverse (341214511342), we get a palindrome (584329923485).

The spelling of 243115412143 in words is "two hundred forty-three billion, one hundred fifteen million, four hundred twelve thousand, one hundred forty-three".