2214843781 has 2 divisors, whose sum is σ = 2214843782. Its totient is φ = 2214843780.

The previous prime is 2214843773. The next prime is 2214843817. The reversal of 2214843781 is 1873484122.

Together with next prime (2214843817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2212855681 + 1988100 = 47041^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2214843781 - 2³ = 2214843773 is a prime.

It is a super-2 number, since 2×2214843781² = 9811065948468751922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2214843751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107421890 + 1107421891.

It is an arithmetic number, because the mean of its divisors is an integer number (1107421891).

Almost surely, 2^2214843781 is an apocalyptic number.

It is an amenable number.

2214843781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2214843781 is an equidigital number, since it uses as much as digits as its factorization.

2214843781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 2214843781 is about 47062.1268218936. The cubic root of 2214843781 is about 1303.5099979139.

The spelling of 2214843781 in words is "two billion, two hundred fourteen million, eight hundred forty-three thousand, seven hundred eighty-one".