2312543209 has 4 divisors (see below), whose sum is σ = 2361746304. Its totient is φ = 2263340116.

The previous prime is 2312543203. The next prime is 2312543243. The reversal of 2312543209 is 9023452132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2312543209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2312543203) 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, 24601477 + ... + 24601570.

It is an arithmetic number, because the mean of its divisors is an integer number (590436576).

Almost surely, 2^2312543209 is an apocalyptic number.

It is an amenable number.

2312543209 is a deficient number, since it is larger than the sum of its proper divisors (49203095).

2312543209 is an equidigital number, since it uses as much as digits as its factorization.

2312543209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49203094.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2312543209 is about 48088.9094178689. The cubic root of 2312543209 is about 1322.4013544155.

The spelling of 2312543209 in words is "two billion, three hundred twelve million, five hundred forty-three thousand, two hundred nine".