2311721344 has 16 divisors (see below), whose sum is σ = 4605382620. Its totient is φ = 1155860608.

The previous prime is 2311721309. The next prime is 2311721369. The reversal of 2311721344 is 4431271132.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9030034 + ... + 9030289.

Almost surely, 2^2311721344 is an apocalyptic number.

It is an amenable number.

2311721344 is a deficient number, since it is larger than the sum of its proper divisors (2293661276).

2311721344 is an equidigital number, since it uses as much as digits as its factorization.

2311721344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18060337 (or 18060325 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 2311721344 is about 48080.3633929695. The cubic root of 2311721344 is about 1322.2446778235.

Adding to 2311721344 its reverse (4431271132), we get a palindrome (6742992476).

The spelling of 2311721344 in words is "two billion, three hundred eleven million, seven hundred twenty-one thousand, three hundred forty-four".