2311543243 has 4 divisors (see below), whose sum is σ = 2311682800. Its totient is φ = 2311403688.

The previous prime is 2311543207. The next prime is 2311543253. The reversal of 2311543243 is 3423451132.

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-2311543243 is a prime.

It is a super-3 number, since 3×2311543243³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2311543253) 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 in 3 ways as a sum of consecutive naturals, for example, 40968 + ... + 79381.

It is an arithmetic number, because the mean of its divisors is an integer number (577920700).

Almost surely, 2^2311543243 is an apocalyptic number.

2311543243 is a deficient number, since it is larger than the sum of its proper divisors (139557).

2311543243 is a wasteful number, since it uses less digits than its factorization.

2311543243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139556.

The product of its digits is 8640, while the sum is 28.

The square root of 2311543243 is about 48078.5112394300. The cubic root of 2311543243 is about 1322.2107205665.

Adding to 2311543243 its reverse (3423451132), we get a palindrome (5734994375).

The spelling of 2311543243 in words is "two billion, three hundred eleven million, five hundred forty-three thousand, two hundred forty-three".