2311681277 has 2 divisors, whose sum is σ = 2311681278. Its totient is φ = 2311681276.

The previous prime is 2311681243. The next prime is 2311681297. The reversal of 2311681277 is 7721861132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1781346436 + 530334841 = 42206^2 + 23029^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311681277 - 2¹⁰ = 2311680253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2311681277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311681237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155840638 + 1155840639.

It is an arithmetic number, because the mean of its divisors is an integer number (1155840639).

Almost surely, 2^2311681277 is an apocalyptic number.

It is an amenable number.

2311681277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311681277 is an equidigital number, since it uses as much as digits as its factorization.

2311681277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 2311681277 is about 48079.9467241801. The cubic root of 2311681277 is about 1322.2370386843.

The spelling of 2311681277 in words is "two billion, three hundred eleven million, six hundred eighty-one thousand, two hundred seventy-seven".