2981631811 has 2 divisors, whose sum is σ = 2981631812. Its totient is φ = 2981631810.

The previous prime is 2981631787. The next prime is 2981631827. The reversal of 2981631811 is 1181361892.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2981631811 - 2¹⁹ = 2981107523 is a prime.

It is not a weakly prime, because it can be changed into another prime (2981631011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490815905 + 1490815906.

It is an arithmetic number, because the mean of its divisors is an integer number (1490815906).

Almost surely, 2^2981631811 is an apocalyptic number.

2981631811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2981631811 is an equidigital number, since it uses as much as digits as its factorization.

2981631811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 40.

The square root of 2981631811 is about 54604.3204426170. The cubic root of 2981631811 is about 1439.3000409579.

The spelling of 2981631811 in words is "two billion, nine hundred eighty-one million, six hundred thirty-one thousand, eight hundred eleven".