2311021313 has 2 divisors, whose sum is σ = 2311021314. Its totient is φ = 2311021312.

The previous prime is 2311021309. The next prime is 2311021331. The reversal of 2311021313 is 3131201132.

Together with next prime (2311021331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1896776704 + 414244609 = 43552^2 + 20353^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311021313 - 2² = 2311021309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2311021291 and 2311021300.

It is not a weakly prime, because it can be changed into another prime (2311021303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155510656 + 1155510657.

It is an arithmetic number, because the mean of its divisors is an integer number (1155510657).

Almost surely, 2^2311021313 is an apocalyptic number.

It is an amenable number.

2311021313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311021313 is an equidigital number, since it uses as much as digits as its factorization.

2311021313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2311021313 is about 48073.0830403044. The cubic root of 2311021313 is about 1322.1111978213. Note that the first 4 decimals are identical.

Adding to 2311021313 its reverse (3131201132), we get a palindrome (5442222445).

The spelling of 2311021313 in words is "two billion, three hundred eleven million, twenty-one thousand, three hundred thirteen".