2247847981 has 2 divisors, whose sum is σ = 2247847982. Its totient is φ = 2247847980.

The previous prime is 2247847963. The next prime is 2247847997. The reversal of 2247847981 is 1897487422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1862354025 + 385493956 = 43155^2 + 19634^2 .

It is a cyclic number.

It is not a de Polignac number, because 2247847981 - 2¹¹ = 2247845933 is a prime.

It is a super-2 number, since 2×2247847981² = 10105641091371552722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2247847081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1123923990 + 1123923991.

It is an arithmetic number, because the mean of its divisors is an integer number (1123923991).

Almost surely, 2^2247847981 is an apocalyptic number.

It is an amenable number.

2247847981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2247847981 is an equidigital number, since it uses as much as digits as its factorization.

2247847981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 52.

The square root of 2247847981 is about 47411.4752037943. The cubic root of 2247847981 is about 1309.9527945618.

The spelling of 2247847981 in words is "two billion, two hundred forty-seven million, eight hundred forty-seven thousand, nine hundred eighty-one".