2271853981 has 2 divisors, whose sum is σ = 2271853982. Its totient is φ = 2271853980.

The previous prime is 2271853967. The next prime is 2271854017. The reversal of 2271853981 is 1893581722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1790051481 + 481802500 = 42309^2 + 21950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2271853981 - 2⁵ = 2271853949 is a prime.

It is a super-2 number, since 2×2271853981² = 10322641021971096722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2271853901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135926990 + 1135926991.

It is an arithmetic number, because the mean of its divisors is an integer number (1135926991).

Almost surely, 2^2271853981 is an apocalyptic number.

It is an amenable number.

2271853981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2271853981 is an equidigital number, since it uses as much as digits as its factorization.

2271853981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 2271853981 is about 47663.9694213564. The cubic root of 2271853981 is about 1314.5995264485.

The spelling of 2271853981 in words is "two billion, two hundred seventy-one million, eight hundred fifty-three thousand, nine hundred eighty-one".