2267981 has 2 divisors, whose sum is σ = 2267982. Its totient is φ = 2267980.

The previous prime is 2267977. The next prime is 2267983. The reversal of 2267981 is 1897622.

It is a happy number.

2267981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 538756 = 1315^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2267981 - 2² = 2267977 is a prime.

It is a super-2 number, since 2×2267981² = 10287475632722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2267983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2267983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133990 + 1133991.

It is an arithmetic number, because the mean of its divisors is an integer number (1133991).

2^2267981 is an apocalyptic number.

It is an amenable number.

2267981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2267981 is an equidigital number, since it uses as much as digits as its factorization.

2267981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 2267981 is about 1505.9817395971. The cubic root of 2267981 is about 131.3852073047.

The spelling of 2267981 in words is "two million, two hundred sixty-seven thousand, nine hundred eighty-one".