2312591261 has 4 divisors (see below), whose sum is σ = 2321805024. Its totient is φ = 2303377500.

The previous prime is 2312591257. The next prime is 2312591269. The reversal of 2312591261 is 1621952132.

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 not a de Polignac number, because 2312591261 - 2² = 2312591257 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 (2312591269) 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, 4606505 + ... + 4607006.

It is an arithmetic number, because the mean of its divisors is an integer number (580451256).

Almost surely, 2^2312591261 is an apocalyptic number.

It is an amenable number.

2312591261 is a deficient number, since it is larger than the sum of its proper divisors (9213763).

2312591261 is an equidigital number, since it uses as much as digits as its factorization.

2312591261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213762.

The product of its digits is 6480, while the sum is 32.

The square root of 2312591261 is about 48089.4090315113. The cubic root of 2312591261 is about 1322.4105136807.

The spelling of 2312591261 in words is "two billion, three hundred twelve million, five hundred ninety-one thousand, two hundred sixty-one".