2311405243 has 4 divisors (see below), whose sum is σ = 2641606000. Its totient is φ = 1981204488.

The previous prime is 2311405237. The next prime is 2311405253. The reversal of 2311405243 is 3425041132.

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

It is a cyclic number.

It is not a de Polignac number, because 2311405243 - 2²¹ = 2309308091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2311405253) 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, 165100368 + ... + 165100381.

It is an arithmetic number, because the mean of its divisors is an integer number (660401500).

Almost surely, 2^2311405243 is an apocalyptic number.

2311405243 is a deficient number, since it is larger than the sum of its proper divisors (330200757).

2311405243 is an equidigital number, since it uses as much as digits as its factorization.

2311405243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330200756.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2311405243 is about 48077.0760654181. The cubic root of 2311405243 is about 1322.1844078840.

Adding to 2311405243 its reverse (3425041132), we get a palindrome (5736446375).

The spelling of 2311405243 in words is "two billion, three hundred eleven million, four hundred five thousand, two hundred forty-three".