2311271993 has 2 divisors, whose sum is σ = 2311271994. Its totient is φ = 2311271992.

The previous prime is 2311271983. The next prime is 2311272023. The reversal of 2311271993 is 3991721132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2241833104 + 69438889 = 47348^2 + 8333^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311271993 - 2¹⁸ = 2311009849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311271923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155635996 + 1155635997.

It is an arithmetic number, because the mean of its divisors is an integer number (1155635997).

Almost surely, 2^2311271993 is an apocalyptic number.

It is an amenable number.

2311271993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311271993 is an equidigital number, since it uses as much as digits as its factorization.

2311271993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 2311271993 is about 48075.6902498550. The cubic root of 2311271993 is about 1322.1589998977.

The spelling of 2311271993 in words is "two billion, three hundred eleven million, two hundred seventy-one thousand, nine hundred ninety-three".